diff --git a/build.sbt b/build.sbt
index b8667490b..fed2145a1 100644
--- a/build.sbt
+++ b/build.sbt
@@ -47,7 +47,7 @@ ThisBuild / libraryDependencySchemes += "org.scala-lang.modules" %% "scala-xml"
 
 Global / semanticdbEnabled := !(Global / insideCI).value
 // Change main/src/main/scala/sbt/plugins/SemanticdbPlugin.scala too, if you change this.
-Global / semanticdbVersion := "4.7.8"
+Global / semanticdbVersion := "4.9.9"
 Global / excludeLintKeys += Utils.componentID
 Global / excludeLintKeys += scriptedBufferLog
 Global / excludeLintKeys += checkPluginCross
diff --git a/launcher-package/build.sbt b/launcher-package/build.sbt
index 2873a7087..52320c9d9 100755
--- a/launcher-package/build.sbt
+++ b/launcher-package/build.sbt
@@ -26,7 +26,7 @@ lazy val sbtVersionToRelease = sys.props.getOrElse("sbt.build.version", sys.env.
       }))
 
 lazy val scala210 = "2.10.7"
-lazy val scala212 = "2.12.19"
+lazy val scala212 = "2.12.20"
 lazy val scala210Jline = "org.scala-lang" % "jline" % scala210
 lazy val jansi = {
   if (sbtVersionToRelease startsWith "1.") "org.fusesource.jansi" % "jansi" % "1.12"
@@ -34,7 +34,7 @@ lazy val jansi = {
 }
 lazy val scala212Compiler = "org.scala-lang" % "scala-compiler" % scala212
 lazy val scala212Jline = "jline" % "jline" % "2.14.6"
-// use the scala-xml version used by the compiler not the latest: https://github.com/scala/scala/blob/v2.12.19/versions.properties
+// use the scala-xml version used by the compiler not the latest: https://github.com/scala/scala/blob/v2.12.20/versions.properties
 lazy val scala212Xml = "org.scala-lang.modules" % "scala-xml_2.12" % "2.2.0"
 lazy val sbtActual = "org.scala-sbt" % "sbt" % sbtVersionToRelease
 
diff --git a/main/src/main/scala/sbt/PluginCross.scala b/main/src/main/scala/sbt/PluginCross.scala
index bfbd80410..773d57bc3 100644
--- a/main/src/main/scala/sbt/PluginCross.scala
+++ b/main/src/main/scala/sbt/PluginCross.scala
@@ -98,7 +98,7 @@ private[sbt] object PluginCross {
     VersionNumber(sv) match {
       case VersionNumber(Seq(0, 12, _*), _, _) => "2.9.2"
       case VersionNumber(Seq(0, 13, _*), _, _) => "2.10.7"
-      case VersionNumber(Seq(1, 0, _*), _, _)  => "2.12.19"
+      case VersionNumber(Seq(1, 0, _*), _, _)  => "2.12.20"
       case _                                   => sys.error(s"Unsupported sbt binary version: $sv")
     }
 }
diff --git a/main/src/main/scala/sbt/plugins/SemanticdbPlugin.scala b/main/src/main/scala/sbt/plugins/SemanticdbPlugin.scala
index f9d8548cb..0a396bf3c 100644
--- a/main/src/main/scala/sbt/plugins/SemanticdbPlugin.scala
+++ b/main/src/main/scala/sbt/plugins/SemanticdbPlugin.scala
@@ -27,7 +27,7 @@ object SemanticdbPlugin extends AutoPlugin {
     semanticdbEnabled := SysProp.semanticdb,
     semanticdbIncludeInJar := false,
     semanticdbOptions := List(),
-    semanticdbVersion := "4.7.8"
+    semanticdbVersion := "4.9.9"
   )
 
   override lazy val projectSettings: Seq[Def.Setting[_]] = Seq(
diff --git a/project/Dependencies.scala b/project/Dependencies.scala
index f4932e547..c5647205f 100644
--- a/project/Dependencies.scala
+++ b/project/Dependencies.scala
@@ -4,7 +4,7 @@ import sbt.contraband.ContrabandPlugin.autoImport._
 
 object Dependencies {
   // WARNING: Please Scala update versions in PluginCross.scala too
-  val scala212 = "2.12.19"
+  val scala212 = "2.12.20"
   val scala213 = "2.13.12"
   val scala3 = "3.3.1"
   val checkPluginCross = settingKey[Unit]("Make sure scalaVersion match up")
diff --git a/sbt-app/src/sbt-test/actions/cross-advanced/build.sbt b/sbt-app/src/sbt-test/actions/cross-advanced/build.sbt
index a54ad5555..2788b5952 100644
--- a/sbt-app/src/sbt-test/actions/cross-advanced/build.sbt
+++ b/sbt-app/src/sbt-test/actions/cross-advanced/build.sbt
@@ -1,6 +1,6 @@
 lazy val check = taskKey[Unit]("")
 lazy val compile2 = taskKey[Unit]("")
-lazy val scala212 = "2.12.19"
+lazy val scala212 = "2.12.20"
 lazy val scala213 = "2.13.12"
 
 ThisBuild / scalaVersion := scala212
diff --git a/sbt-app/src/sbt-test/actions/cross-incremental/build.sbt b/sbt-app/src/sbt-test/actions/cross-incremental/build.sbt
index 751353326..79b7bdf27 100644
--- a/sbt-app/src/sbt-test/actions/cross-incremental/build.sbt
+++ b/sbt-app/src/sbt-test/actions/cross-incremental/build.sbt
@@ -1,5 +1,5 @@
-scalaVersion := "2.12.19"
-crossScalaVersions := List("2.12.19", "2.13.12")
+scalaVersion := "2.12.20"
+crossScalaVersions := List("2.12.20", "2.13.12")
 
 val setLastModified = taskKey[Unit]("Sets the last modified time for classfiles")
 setLastModified := {
diff --git a/sbt-app/src/sbt-test/actions/cross-multi-parser/build.sbt b/sbt-app/src/sbt-test/actions/cross-multi-parser/build.sbt
index bc2b10efb..bb4a1ec0e 100644
--- a/sbt-app/src/sbt-test/actions/cross-multi-parser/build.sbt
+++ b/sbt-app/src/sbt-test/actions/cross-multi-parser/build.sbt
@@ -1 +1 @@
-crossScalaVersions := Seq[String]("2.11.12", "2.12.19")
+crossScalaVersions := Seq[String]("2.11.12", "2.12.20")
diff --git a/sbt-app/src/sbt-test/actions/cross-multiproject/ref/build.sbt b/sbt-app/src/sbt-test/actions/cross-multiproject/ref/build.sbt
index 6fdb53f78..32936b7d0 100644
--- a/sbt-app/src/sbt-test/actions/cross-multiproject/ref/build.sbt
+++ b/sbt-app/src/sbt-test/actions/cross-multiproject/ref/build.sbt
@@ -1,4 +1,4 @@
 lazy val external = (project in file("."))
   .settings(
-    scalaVersion := "2.12.19"
+    scalaVersion := "2.12.20"
   )
diff --git a/sbt-app/src/sbt-test/actions/cross-strict-aggregation/build.sbt b/sbt-app/src/sbt-test/actions/cross-strict-aggregation/build.sbt
index 5ddafe8b5..cbc207fc1 100644
--- a/sbt-app/src/sbt-test/actions/cross-strict-aggregation/build.sbt
+++ b/sbt-app/src/sbt-test/actions/cross-strict-aggregation/build.sbt
@@ -1,4 +1,4 @@
-lazy val scala212 = "2.12.19"
+lazy val scala212 = "2.12.20"
 lazy val scala213 = "2.13.12"
 
 ThisBuild / scalaVersion := scala212
diff --git a/sbt-app/src/sbt-test/actions/doc/build.sbt b/sbt-app/src/sbt-test/actions/doc/build.sbt
index 98e1c25bc..954bb8030 100644
--- a/sbt-app/src/sbt-test/actions/doc/build.sbt
+++ b/sbt-app/src/sbt-test/actions/doc/build.sbt
@@ -5,8 +5,8 @@ import Parsers._
 lazy val root = (project in file("."))
   .settings(
     crossPaths := false,
-    crossScalaVersions := Seq("2.12.19", "2.13.12"),
-    scalaVersion := "2.12.19",
+    crossScalaVersions := Seq("2.12.20", "2.13.12"),
+    scalaVersion := "2.12.20",
     Compile / doc / scalacOptions += "-Xfatal-warnings",
     commands += Command.command("excludeB") { s =>
       val impl = """val src = (Compile / sources).value; src.filterNot(_.getName.contains("B"))"""
diff --git a/sbt-app/src/sbt-test/actions/generator/build.sbt b/sbt-app/src/sbt-test/actions/generator/build.sbt
index 349e7821c..6d67c821d 100644
--- a/sbt-app/src/sbt-test/actions/generator/build.sbt
+++ b/sbt-app/src/sbt-test/actions/generator/build.sbt
@@ -1,6 +1,6 @@
 val buildInfo = taskKey[Seq[File]]("generates the build info")
 
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 
 lazy val root = (project in file("."))
   .settings(
diff --git a/sbt-app/src/sbt-test/actions/multi-command/build.sbt b/sbt-app/src/sbt-test/actions/multi-command/build.sbt
index 6853cdcfa..606ba1657 100644
--- a/sbt-app/src/sbt-test/actions/multi-command/build.sbt
+++ b/sbt-app/src/sbt-test/actions/multi-command/build.sbt
@@ -19,4 +19,4 @@ val dynamicTask = taskKey[Unit]("dynamic input task")
 
 dynamicTask := { println("not yet et") }
 
-crossScalaVersions := "2.11.12" :: "2.12.19" :: Nil
+crossScalaVersions := "2.11.12" :: "2.12.20" :: Nil
diff --git a/sbt-app/src/sbt-test/actions/package-delete-target/build.sbt b/sbt-app/src/sbt-test/actions/package-delete-target/build.sbt
index b238d3d93..01163a404 100644
--- a/sbt-app/src/sbt-test/actions/package-delete-target/build.sbt
+++ b/sbt-app/src/sbt-test/actions/package-delete-target/build.sbt
@@ -1,5 +1,5 @@
 lazy val root = (project in file("."))
   .settings(
     name := "delete-target",
-    scalaVersion := "2.12.19"
+    scalaVersion := "2.12.20"
   )
diff --git a/sbt-app/src/sbt-test/actions/query/build.sbt b/sbt-app/src/sbt-test/actions/query/build.sbt
index df2bf23a2..ff3f4c354 100644
--- a/sbt-app/src/sbt-test/actions/query/build.sbt
+++ b/sbt-app/src/sbt-test/actions/query/build.sbt
@@ -12,7 +12,7 @@ lazy val foo = project
 lazy val bar = project
 lazy val baz = project
   .settings(
-    scalaVersion := "2.12.19",
+    scalaVersion := "2.12.20",
   )
 
 someTask := {
diff --git a/sbt-app/src/sbt-test/actions/remote-cache-semanticdb/build.sbt b/sbt-app/src/sbt-test/actions/remote-cache-semanticdb/build.sbt
index fa9f2fbd7..3153cb66d 100644
--- a/sbt-app/src/sbt-test/actions/remote-cache-semanticdb/build.sbt
+++ b/sbt-app/src/sbt-test/actions/remote-cache-semanticdb/build.sbt
@@ -1,6 +1,6 @@
 name := "my-project"
 
-scalaVersion := "2.12.19"
+scalaVersion := "2.12.20"
 
 semanticdbIncludeInJar := true
 
diff --git a/sbt-app/src/sbt-test/actions/remote-cache/build.sbt b/sbt-app/src/sbt-test/actions/remote-cache/build.sbt
index 9f6c91865..4d87f8c62 100644
--- a/sbt-app/src/sbt-test/actions/remote-cache/build.sbt
+++ b/sbt-app/src/sbt-test/actions/remote-cache/build.sbt
@@ -8,7 +8,7 @@ lazy val CustomArtifact = config("custom-artifact")
 val recordPreviousIterations = taskKey[Unit]("Record previous iterations.")
 val checkIterations = inputKey[Unit]("Verifies the accumulated number of iterations of incremental compilation.")
 
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 ThisBuild / pushRemoteCacheTo := Some(
   MavenCache("local-cache", (ThisBuild / baseDirectory).value / "r")
 )
diff --git a/sbt-app/src/sbt-test/classloader-cache/akka-actor-system/build.sbt b/sbt-app/src/sbt-test/classloader-cache/akka-actor-system/build.sbt
index b89e34a3f..f2309bb9b 100644
--- a/sbt-app/src/sbt-test/classloader-cache/akka-actor-system/build.sbt
+++ b/sbt-app/src/sbt-test/classloader-cache/akka-actor-system/build.sbt
@@ -2,7 +2,7 @@ ThisBuild / turbo := true
 
 val akkaTest = (project in file(".")).settings(
   name := "akka-test",
-  scalaVersion := "2.12.19",
+  scalaVersion := "2.12.20",
   libraryDependencies ++= Seq(
     "com.typesafe.akka" %% "akka-actor" % "2.5.16",
     "com.lihaoyi" %% "utest" % "0.6.6" % "test"
diff --git a/sbt-app/src/sbt-test/classloader-cache/jni/build.sbt b/sbt-app/src/sbt-test/classloader-cache/jni/build.sbt
index e92d9b23d..f901176a9 100644
--- a/sbt-app/src/sbt-test/classloader-cache/jni/build.sbt
+++ b/sbt-app/src/sbt-test/classloader-cache/jni/build.sbt
@@ -13,7 +13,7 @@ def wrap[A1](task: InputKey[A1]): Def.Initialize[Task[Unit]] =
 // ThisBuild / turbo := true
 
 val root = (project in file(".")).settings(
-  scalaVersion := "2.12.19",
+  scalaVersion := "2.12.20",
   javacOptions ++= Seq("-source", "1.8", "-target", "1.8", "-h",
   sourceDirectory.value.toPath.resolve("main/native/include").toString),
   libraryDependencies += "com.lihaoyi" %% "utest" % "0.6.6" % "test",
diff --git a/sbt-app/src/sbt-test/classloader-cache/library-mismatch/build.sbt b/sbt-app/src/sbt-test/classloader-cache/library-mismatch/build.sbt
index dec40d399..fb6fcaac0 100644
--- a/sbt-app/src/sbt-test/classloader-cache/library-mismatch/build.sbt
+++ b/sbt-app/src/sbt-test/classloader-cache/library-mismatch/build.sbt
@@ -2,7 +2,7 @@ ThisBuild / turbo := true
 
 val snapshot = (project in file(".")).settings(
   name := "mismatched-libraries",
-  scalaVersion := "2.12.19",
+  scalaVersion := "2.12.20",
   libraryDependencies ++= Seq("com.lihaoyi" %% "utest" % "0.6.6" % "test"),
   testFrameworks := Seq(TestFramework("utest.runner.Framework")),
   resolvers += "Local Maven" at file("libraries/ivy").toURI.toURL.toString,
diff --git a/sbt-app/src/sbt-test/classloader-cache/runtime-layers/build.sbt b/sbt-app/src/sbt-test/classloader-cache/runtime-layers/build.sbt
index d029cd576..215014a80 100644
--- a/sbt-app/src/sbt-test/classloader-cache/runtime-layers/build.sbt
+++ b/sbt-app/src/sbt-test/classloader-cache/runtime-layers/build.sbt
@@ -1,6 +1,6 @@
 val layeringStrategyTest = (project in file(".")).settings(
   name := "layering-strategy-test",
-  scalaVersion := "2.12.19",
+  scalaVersion := "2.12.20",
   organization := "sbt",
   libraryDependencies += "com.typesafe.akka" %% "akka-actor" % "2.5.16",
 )
diff --git a/sbt-app/src/sbt-test/classloader-cache/spark/build.sbt b/sbt-app/src/sbt-test/classloader-cache/spark/build.sbt
index 43b6315d5..b105446d8 100644
--- a/sbt-app/src/sbt-test/classloader-cache/spark/build.sbt
+++ b/sbt-app/src/sbt-test/classloader-cache/spark/build.sbt
@@ -2,7 +2,7 @@ name := "Simple Project"
 
 version := "1.0"
 
-scalaVersion := "2.12.19"
+scalaVersion := "2.12.20"
 
 libraryDependencies += "org.apache.spark" %% "spark-sql" % "2.4.3"
 
diff --git a/sbt-app/src/sbt-test/classloader-cache/utest/build.sbt b/sbt-app/src/sbt-test/classloader-cache/utest/build.sbt
index e504b97a7..369160320 100644
--- a/sbt-app/src/sbt-test/classloader-cache/utest/build.sbt
+++ b/sbt-app/src/sbt-test/classloader-cache/utest/build.sbt
@@ -2,7 +2,7 @@ ThisBuild / turbo := true
 
 val utestTest = (project in file(".")).settings(
   name := "utest-test",
-  scalaVersion := "2.12.19",
+  scalaVersion := "2.12.20",
   libraryDependencies ++= Seq(
     "com.lihaoyi" %% "utest" % "0.6.6" % "test"
   ),
diff --git a/sbt-app/src/sbt-test/compiler-project/error-in-invalidated/build.sbt b/sbt-app/src/sbt-test/compiler-project/error-in-invalidated/build.sbt
index ba36bc767..442a697f7 100644
--- a/sbt-app/src/sbt-test/compiler-project/error-in-invalidated/build.sbt
+++ b/sbt-app/src/sbt-test/compiler-project/error-in-invalidated/build.sbt
@@ -1,4 +1,4 @@
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 
 lazy val root = (project in file(".")).
   settings(
diff --git a/sbt-app/src/sbt-test/compiler-project/macro-config/build.sbt b/sbt-app/src/sbt-test/compiler-project/macro-config/build.sbt
index db9150602..621087133 100644
--- a/sbt-app/src/sbt-test/compiler-project/macro-config/build.sbt
+++ b/sbt-app/src/sbt-test/compiler-project/macro-config/build.sbt
@@ -5,7 +5,7 @@ val Macro = config("macro").hide.extend(Compile)
 
 lazy val root = (project in file("."))
   .settings(
-    scalaVersion := "2.12.19",
+    scalaVersion := "2.12.20",
 
     // Adds a "macro" configuration for macro dependencies.
     ivyConfigurations.value += Macro,
diff --git a/sbt-app/src/sbt-test/compiler-project/run-test/build.sbt b/sbt-app/src/sbt-test/compiler-project/run-test/build.sbt
index 6f986f803..7acee1071 100644
--- a/sbt-app/src/sbt-test/compiler-project/run-test/build.sbt
+++ b/sbt-app/src/sbt-test/compiler-project/run-test/build.sbt
@@ -1,4 +1,4 @@
-scalaVersion := "2.12.19"
+scalaVersion := "2.12.20"
 libraryDependencies ++= Seq(
   "com.novocode" % "junit-interface" % "0.5" % Test,
   "junit" % "junit" % "4.13.1" % Test,
diff --git a/sbt-app/src/sbt-test/compiler-project/separate-analysis-per-scala/build.sbt b/sbt-app/src/sbt-test/compiler-project/separate-analysis-per-scala/build.sbt
index b65bda46b..ebd76a32e 100644
--- a/sbt-app/src/sbt-test/compiler-project/separate-analysis-per-scala/build.sbt
+++ b/sbt-app/src/sbt-test/compiler-project/separate-analysis-per-scala/build.sbt
@@ -1,4 +1,4 @@
-lazy val scala212 = "2.12.19"
+lazy val scala212 = "2.12.20"
 lazy val scala213 = "2.13.12"
 ThisBuild / scalaVersion := scala212
 
diff --git a/sbt-app/src/sbt-test/console/project-compiler-bridge/project/build.sbt b/sbt-app/src/sbt-test/console/project-compiler-bridge/project/build.sbt
index 8f5047976..76f36acc2 100644
--- a/sbt-app/src/sbt-test/console/project-compiler-bridge/project/build.sbt
+++ b/sbt-app/src/sbt-test/console/project-compiler-bridge/project/build.sbt
@@ -1 +1 @@
-scalaVersion := "2.12.19"
+scalaVersion := "2.12.20"
diff --git a/sbt-app/src/sbt-test/dependency-graph/cachedResolution/build.sbt b/sbt-app/src/sbt-test/dependency-graph/cachedResolution/build.sbt
index 29548c20e..4ecda4a16 100644
--- a/sbt-app/src/sbt-test/dependency-graph/cachedResolution/build.sbt
+++ b/sbt-app/src/sbt-test/dependency-graph/cachedResolution/build.sbt
@@ -1,4 +1,4 @@
-scalaVersion := "2.12.19"
+scalaVersion := "2.12.20"
 
 libraryDependencies += "org.slf4j" % "slf4j-api" % "1.7.28"
 updateOptions := updateOptions.value.withCachedResolution(true)
diff --git a/sbt-app/src/sbt-test/dependency-graph/ignoreScalaLibrary/build.sbt b/sbt-app/src/sbt-test/dependency-graph/ignoreScalaLibrary/build.sbt
index bc11b4a40..4593aca81 100644
--- a/sbt-app/src/sbt-test/dependency-graph/ignoreScalaLibrary/build.sbt
+++ b/sbt-app/src/sbt-test/dependency-graph/ignoreScalaLibrary/build.sbt
@@ -1,4 +1,4 @@
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 
 libraryDependencies ++= Seq(
   "org.slf4j" % "slf4j-api" % "1.7.2",
diff --git a/sbt-app/src/sbt-test/dependency-graph/toFileSubTask/build.sbt b/sbt-app/src/sbt-test/dependency-graph/toFileSubTask/build.sbt
index 21107faee..7d19cacd5 100644
--- a/sbt-app/src/sbt-test/dependency-graph/toFileSubTask/build.sbt
+++ b/sbt-app/src/sbt-test/dependency-graph/toFileSubTask/build.sbt
@@ -1,4 +1,4 @@
-scalaVersion := "2.12.19"
+scalaVersion := "2.12.20"
 organization := "org.example"
 version := "0.1"
 
diff --git a/sbt-app/src/sbt-test/dependency-management/artifact/build.sbt b/sbt-app/src/sbt-test/dependency-management/artifact/build.sbt
index 60a4389f7..f8fcd2b57 100644
--- a/sbt-app/src/sbt-test/dependency-management/artifact/build.sbt
+++ b/sbt-app/src/sbt-test/dependency-management/artifact/build.sbt
@@ -5,7 +5,7 @@ lazy val checkFull = taskKey[Unit]("")
 lazy val check = taskKey[Unit]("")
 lazy val checkArtifact = taskKey[Unit]("")
 
-ThisBuild / scalaVersion     := "2.12.19"
+ThisBuild / scalaVersion     := "2.12.20"
 ThisBuild / version          := "0.1.0-SNAPSHOT"
 ThisBuild / organization     := "com.example"
 ThisBuild / organizationName := "example"
diff --git a/sbt-app/src/sbt-test/dependency-management/cache-classifiers/multi.sbt b/sbt-app/src/sbt-test/dependency-management/cache-classifiers/multi.sbt
index e1cfd2690..6b3df60e5 100644
--- a/sbt-app/src/sbt-test/dependency-management/cache-classifiers/multi.sbt
+++ b/sbt-app/src/sbt-test/dependency-management/cache-classifiers/multi.sbt
@@ -1,6 +1,6 @@
 import xsbti.AppConfiguration
 
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 
 // TTL of Coursier is 24h
 ThisBuild / csrCacheDirectory := (ThisBuild / baseDirectory).value / "coursier-cache"
diff --git a/sbt-app/src/sbt-test/dependency-management/compiler-bridge-binary/build.sbt b/sbt-app/src/sbt-test/dependency-management/compiler-bridge-binary/build.sbt
index 59aad4118..f9cf8fddd 100644
--- a/sbt-app/src/sbt-test/dependency-management/compiler-bridge-binary/build.sbt
+++ b/sbt-app/src/sbt-test/dependency-management/compiler-bridge-binary/build.sbt
@@ -1,4 +1,4 @@
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 
 lazy val check = taskKey[Unit]("")
 
diff --git a/sbt-app/src/sbt-test/dependency-management/conflict-coursier/build.sbt b/sbt-app/src/sbt-test/dependency-management/conflict-coursier/build.sbt
index 436ed6e36..19d25ed0b 100644
--- a/sbt-app/src/sbt-test/dependency-management/conflict-coursier/build.sbt
+++ b/sbt-app/src/sbt-test/dependency-management/conflict-coursier/build.sbt
@@ -1,4 +1,4 @@
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 libraryDependencies ++= List(
   "org.webjars.npm" % "randomatic" % "1.1.7",
   "org.webjars.npm" % "is-odd"     % "2.0.0",
diff --git a/sbt-app/src/sbt-test/dependency-management/global-plugins/build.sbt b/sbt-app/src/sbt-test/dependency-management/global-plugins/build.sbt
index 8f5047976..76f36acc2 100644
--- a/sbt-app/src/sbt-test/dependency-management/global-plugins/build.sbt
+++ b/sbt-app/src/sbt-test/dependency-management/global-plugins/build.sbt
@@ -1 +1 @@
-scalaVersion := "2.12.19"
+scalaVersion := "2.12.20"
diff --git a/sbt-app/src/sbt-test/dependency-management/snapshot-local/build.sbt b/sbt-app/src/sbt-test/dependency-management/snapshot-local/build.sbt
index 4f6f86397..64097d033 100644
--- a/sbt-app/src/sbt-test/dependency-management/snapshot-local/build.sbt
+++ b/sbt-app/src/sbt-test/dependency-management/snapshot-local/build.sbt
@@ -1,5 +1,5 @@
 ThisBuild / organization := "com.example"
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 ThisBuild / csrCacheDirectory := (ThisBuild / baseDirectory).value / "coursier-cache"
 
 def localCache =
diff --git a/sbt-app/src/sbt-test/dependency-management/snapshot-resolution/build.sbt b/sbt-app/src/sbt-test/dependency-management/snapshot-resolution/build.sbt
index 9e9cf657a..b6f910ce4 100644
--- a/sbt-app/src/sbt-test/dependency-management/snapshot-resolution/build.sbt
+++ b/sbt-app/src/sbt-test/dependency-management/snapshot-resolution/build.sbt
@@ -1,5 +1,5 @@
 ThisBuild / organization := "com.example"
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 
 // TTL is 24h so we can't detect the change
 ThisBuild / csrCacheDirectory := (ThisBuild / baseDirectory).value / "coursier-cache"
diff --git a/sbt-app/src/sbt-test/java/cross/build.sbt b/sbt-app/src/sbt-test/java/cross/build.sbt
index b5f39d15e..cbb55bd7d 100644
--- a/sbt-app/src/sbt-test/java/cross/build.sbt
+++ b/sbt-app/src/sbt-test/java/cross/build.sbt
@@ -4,7 +4,7 @@ val check = inputKey[Unit]("Runs the check")
 
 lazy val root = (project in file("."))
   .settings(
-    ThisBuild / scalaVersion := "2.12.19",
+    ThisBuild / scalaVersion := "2.12.20",
     crossJavaVersions := List("1.8"),
 
     // read out.txt and see if it starts with the passed in number
diff --git a/sbt-app/src/sbt-test/java/cross/changes/build.sbt b/sbt-app/src/sbt-test/java/cross/changes/build.sbt
index 9facfdb8d..2d09de654 100644
--- a/sbt-app/src/sbt-test/java/cross/changes/build.sbt
+++ b/sbt-app/src/sbt-test/java/cross/changes/build.sbt
@@ -4,7 +4,7 @@ val check = inputKey[Unit]("Runs the check")
 
 lazy val root = (project in file("."))
   .settings(
-    ThisBuild / scalaVersion := "2.12.19",
+    ThisBuild / scalaVersion := "2.12.20",
     crossJavaVersions := List("1.8", "10"),
 
     // read out.txt and see if it starts with the passed in number
diff --git a/sbt-app/src/sbt-test/plugins/hydra/build.sbt b/sbt-app/src/sbt-test/plugins/hydra/build.sbt
index efc3b0a27..9ee405caa 100644
--- a/sbt-app/src/sbt-test/plugins/hydra/build.sbt
+++ b/sbt-app/src/sbt-test/plugins/hydra/build.sbt
@@ -1,4 +1,4 @@
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 
 lazy val check = taskKey[Unit]("")
 
diff --git a/sbt-app/src/sbt-test/plugins/sbt-native-packager/build.sbt b/sbt-app/src/sbt-test/plugins/sbt-native-packager/build.sbt
index 202a48a91..7783ed396 100644
--- a/sbt-app/src/sbt-test/plugins/sbt-native-packager/build.sbt
+++ b/sbt-app/src/sbt-test/plugins/sbt-native-packager/build.sbt
@@ -1,4 +1,4 @@
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 
 name := "hello"
 enablePlugins(JavaAppPackaging)
diff --git a/sbt-app/src/sbt-test/plugins/unidoc/build.sbt b/sbt-app/src/sbt-test/plugins/unidoc/build.sbt
index 2abb1992d..afa976179 100644
--- a/sbt-app/src/sbt-test/plugins/unidoc/build.sbt
+++ b/sbt-app/src/sbt-test/plugins/unidoc/build.sbt
@@ -1,4 +1,4 @@
-scalaVersion := "2.12.19"
+scalaVersion := "2.12.20"
 scalacOptions += "-Xfatal-warnings" // required for the test
 
 enablePlugins(ScalaUnidocPlugin)
diff --git a/sbt-app/src/sbt-test/project-matrix/lib/build.sbt b/sbt-app/src/sbt-test/project-matrix/lib/build.sbt
index 00ace3bdf..a8068e674 100644
--- a/sbt-app/src/sbt-test/project-matrix/lib/build.sbt
+++ b/sbt-app/src/sbt-test/project-matrix/lib/build.sbt
@@ -1,11 +1,11 @@
 version := "0.1.0-SNAPSHOT"
 
 lazy val util = projectMatrix
-  .jvmPlatform(scalaVersions = Seq("2.12.19", "2.13.13"))
+  .jvmPlatform(scalaVersions = Seq("2.12.20", "2.13.13"))
 
 lazy val root = (projectMatrix in file("."))
   .dependsOn(util)
-  .jvmPlatform(scalaVersions = Seq("2.12.19"))
+  .jvmPlatform(scalaVersions = Seq("2.12.20"))
 
 // ss is second system
 lazy val ss = projectMatrix
@@ -13,4 +13,4 @@ lazy val ss = projectMatrix
   .jvmPlatform(scalaVersions = Seq("2.13.13"))
 
 lazy val strayJar = project
-  .settings(scalaVersion := "2.12.19")
+  .settings(scalaVersion := "2.12.20")
diff --git a/sbt-app/src/sbt-test/project-matrix/plugin/build.sbt b/sbt-app/src/sbt-test/project-matrix/plugin/build.sbt
index ad99d07fd..d191af20b 100644
--- a/sbt-app/src/sbt-test/project-matrix/plugin/build.sbt
+++ b/sbt-app/src/sbt-test/project-matrix/plugin/build.sbt
@@ -1,5 +1,5 @@
 val scala3 = "3.3.3"
-val scala212 = "2.12.19"
+val scala212 = "2.12.20"
 
 organization := "com.example"
 version := "0.1.0-SNAPSHOT"
diff --git a/sbt-app/src/sbt-test/project/common-settings-synthetic-root/build.sbt b/sbt-app/src/sbt-test/project/common-settings-synthetic-root/build.sbt
index 8d54a1f7e..d092200d0 100644
--- a/sbt-app/src/sbt-test/project/common-settings-synthetic-root/build.sbt
+++ b/sbt-app/src/sbt-test/project/common-settings-synthetic-root/build.sbt
@@ -1,6 +1,6 @@
 lazy val check = taskKey[Unit]("")
 
-def scala212 = "2.12.19"
+def scala212 = "2.12.20"
 scalaVersion := scala212
 val o = "com.example"
 organization := o
diff --git a/sbt-app/src/sbt-test/project/common-settings/build.sbt b/sbt-app/src/sbt-test/project/common-settings/build.sbt
index 75869076d..6ae7dac60 100644
--- a/sbt-app/src/sbt-test/project/common-settings/build.sbt
+++ b/sbt-app/src/sbt-test/project/common-settings/build.sbt
@@ -1,6 +1,6 @@
 lazy val check = taskKey[Unit]("")
 
-def scala212 = "2.12.19"
+def scala212 = "2.12.20"
 scalaVersion := scala212
 val o = "com.example"
 organization := o
diff --git a/sbt-app/src/sbt-test/project1/aggregate/projA/build.sbt b/sbt-app/src/sbt-test/project1/aggregate/projA/build.sbt
index b12345076..af30eb1d0 100644
--- a/sbt-app/src/sbt-test/project1/aggregate/projA/build.sbt
+++ b/sbt-app/src/sbt-test/project1/aggregate/projA/build.sbt
@@ -1,3 +1,3 @@
 name := "projA"
 
-scalaVersion := "2.12.19"
+scalaVersion := "2.12.20"
diff --git a/sbt-app/src/sbt-test/project1/cross-plugins-defaults/build.sbt b/sbt-app/src/sbt-test/project1/cross-plugins-defaults/build.sbt
index 212ba7ce5..12f20e965 100644
--- a/sbt-app/src/sbt-test/project1/cross-plugins-defaults/build.sbt
+++ b/sbt-app/src/sbt-test/project1/cross-plugins-defaults/build.sbt
@@ -1,7 +1,7 @@
 val baseSbt = "1."
 
-val buildCrossList = List("2.10.7", "2.11.12", "2.12.19")
-(ThisBuild / scalaVersion) := "2.12.19"
+val buildCrossList = List("2.10.7", "2.11.12", "2.12.20")
+(ThisBuild / scalaVersion) := "2.12.20"
 (ThisBuild / crossScalaVersions) := buildCrossList
 
 addSbtPlugin("com.eed3si9n" % "sbt-buildinfo" % "0.7.0")
diff --git a/sbt-app/src/sbt-test/project1/flatten/build.sbt b/sbt-app/src/sbt-test/project1/flatten/build.sbt
index 89646a328..d5fe2e781 100644
--- a/sbt-app/src/sbt-test/project1/flatten/build.sbt
+++ b/sbt-app/src/sbt-test/project1/flatten/build.sbt
@@ -1,6 +1,6 @@
 val unpackage = TaskKey[Unit]("unpackage")
 
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 
 lazy val root = (project in file("."))
   .settings(
diff --git a/sbt-app/src/sbt-test/project1/internal-tracking/build.sbt b/sbt-app/src/sbt-test/project1/internal-tracking/build.sbt
index 711d9f88a..c34f007b5 100644
--- a/sbt-app/src/sbt-test/project1/internal-tracking/build.sbt
+++ b/sbt-app/src/sbt-test/project1/internal-tracking/build.sbt
@@ -1,4 +1,4 @@
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 ThisBuild / trackInternalDependencies := TrackLevel.NoTracking
 
 lazy val root = (project in file("."))
diff --git a/sbt-app/src/sbt-test/project1/sbt-plugin/build.sbt b/sbt-app/src/sbt-test/project1/sbt-plugin/build.sbt
index 681686b5a..3b1ec5328 100644
--- a/sbt-app/src/sbt-test/project1/sbt-plugin/build.sbt
+++ b/sbt-app/src/sbt-test/project1/sbt-plugin/build.sbt
@@ -1,6 +1,6 @@
 lazy val root = project.in(file("."))
   .enablePlugins(SbtPlugin)
   .settings(
-    scalaVersion := "2.12.19",
+    scalaVersion := "2.12.20",
     scalacOptions ++= Seq("-Xfatal-warnings", "-Xlint")
   )
diff --git a/sbt-app/src/sbt-test/project1/sbt-plugin/changes/oldSbtPlugin.sbt b/sbt-app/src/sbt-test/project1/sbt-plugin/changes/oldSbtPlugin.sbt
index 7b654c196..1738ee9a5 100644
--- a/sbt-app/src/sbt-test/project1/sbt-plugin/changes/oldSbtPlugin.sbt
+++ b/sbt-app/src/sbt-test/project1/sbt-plugin/changes/oldSbtPlugin.sbt
@@ -1,6 +1,6 @@
 lazy val root = project.in(file("."))
   .settings(
-    scalaVersion := "2.12.19",
+    scalaVersion := "2.12.20",
     sbtPlugin := true,
     scalacOptions ++= Seq("-Xfatal-warnings", "-Xlint")
   )
diff --git a/sbt-app/src/sbt-test/project1/semanticdb/build.sbt b/sbt-app/src/sbt-test/project1/semanticdb/build.sbt
index fcc03b2ec..03ad56d26 100644
--- a/sbt-app/src/sbt-test/project1/semanticdb/build.sbt
+++ b/sbt-app/src/sbt-test/project1/semanticdb/build.sbt
@@ -1,4 +1,4 @@
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 ThisBuild / semanticdbEnabled := true
 ThisBuild / semanticdbIncludeInJar := true
 
diff --git a/sbt-app/src/sbt-test/project1/unified/build.sbt b/sbt-app/src/sbt-test/project1/unified/build.sbt
index 18ae6cfce..cbb558572 100644
--- a/sbt-app/src/sbt-test/project1/unified/build.sbt
+++ b/sbt-app/src/sbt-test/project1/unified/build.sbt
@@ -1,4 +1,4 @@
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 
 import sbt.internal.CommandStrings.{ inspectBrief, inspectDetailed }
 import sbt.internal.Inspect
diff --git a/sbt-app/src/sbt-test/reporter/nowarn/build.sbt b/sbt-app/src/sbt-test/reporter/nowarn/build.sbt
index ecb8c9729..c1d862a45 100644
--- a/sbt-app/src/sbt-test/reporter/nowarn/build.sbt
+++ b/sbt-app/src/sbt-test/reporter/nowarn/build.sbt
@@ -1,4 +1,4 @@
-scalaVersion := "2.12.19"
+scalaVersion := "2.12.20"
 
 lazy val sub1 = project
 
diff --git a/sbt-app/src/sbt-test/run/fork-loader/build.sbt b/sbt-app/src/sbt-test/run/fork-loader/build.sbt
index c5b8530f1..b440e9f31 100644
--- a/sbt-app/src/sbt-test/run/fork-loader/build.sbt
+++ b/sbt-app/src/sbt-test/run/fork-loader/build.sbt
@@ -1,6 +1,6 @@
 val scalcheck = "org.scalacheck" %% "scalacheck" % "1.14.0"
 
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 
 lazy val root = (project in file("."))
   .settings(
diff --git a/sbt-app/src/sbt-test/source-dependencies/binary/build.sbt b/sbt-app/src/sbt-test/source-dependencies/binary/build.sbt
index 98ff1e4b2..f787f5da0 100644
--- a/sbt-app/src/sbt-test/source-dependencies/binary/build.sbt
+++ b/sbt-app/src/sbt-test/source-dependencies/binary/build.sbt
@@ -1,4 +1,4 @@
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 
 lazy val dep = project
 
diff --git a/sbt-app/src/sbt-test/source-dependencies/implicit-search/build.sbt b/sbt-app/src/sbt-test/source-dependencies/implicit-search/build.sbt
index 8f5047976..76f36acc2 100644
--- a/sbt-app/src/sbt-test/source-dependencies/implicit-search/build.sbt
+++ b/sbt-app/src/sbt-test/source-dependencies/implicit-search/build.sbt
@@ -1 +1 @@
-scalaVersion := "2.12.19"
+scalaVersion := "2.12.20"
diff --git a/sbt-app/src/sbt-test/source-dependencies/macro-annotation/build.sbt b/sbt-app/src/sbt-test/source-dependencies/macro-annotation/build.sbt
index 14f708f09..418bd8502 100644
--- a/sbt-app/src/sbt-test/source-dependencies/macro-annotation/build.sbt
+++ b/sbt-app/src/sbt-test/source-dependencies/macro-annotation/build.sbt
@@ -1,4 +1,4 @@
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 
 val paradiseVersion = "2.1.1"
 val commonSettings = Seq(
diff --git a/sbt-app/src/sbt-test/source-dependencies/macro-arg-dep-nested/build.sbt b/sbt-app/src/sbt-test/source-dependencies/macro-arg-dep-nested/build.sbt
index 4e0809123..cd1f0fda4 100644
--- a/sbt-app/src/sbt-test/source-dependencies/macro-arg-dep-nested/build.sbt
+++ b/sbt-app/src/sbt-test/source-dependencies/macro-arg-dep-nested/build.sbt
@@ -1,4 +1,4 @@
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 
 val defaultSettings = Seq(
   libraryDependencies += scalaVersion("org.scala-lang" % "scala-reflect" % _ ).value
diff --git a/sbt-app/src/sbt-test/source-dependencies/macro-arg-dep-stackoverflow/build.sbt b/sbt-app/src/sbt-test/source-dependencies/macro-arg-dep-stackoverflow/build.sbt
index 4e0809123..cd1f0fda4 100644
--- a/sbt-app/src/sbt-test/source-dependencies/macro-arg-dep-stackoverflow/build.sbt
+++ b/sbt-app/src/sbt-test/source-dependencies/macro-arg-dep-stackoverflow/build.sbt
@@ -1,4 +1,4 @@
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 
 val defaultSettings = Seq(
   libraryDependencies += scalaVersion("org.scala-lang" % "scala-reflect" % _ ).value
diff --git a/sbt-app/src/sbt-test/source-dependencies/macro-arg-dep/build.sbt b/sbt-app/src/sbt-test/source-dependencies/macro-arg-dep/build.sbt
index 4e0809123..cd1f0fda4 100644
--- a/sbt-app/src/sbt-test/source-dependencies/macro-arg-dep/build.sbt
+++ b/sbt-app/src/sbt-test/source-dependencies/macro-arg-dep/build.sbt
@@ -1,4 +1,4 @@
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 
 val defaultSettings = Seq(
   libraryDependencies += scalaVersion("org.scala-lang" % "scala-reflect" % _ ).value
diff --git a/sbt-app/src/sbt-test/source-dependencies/macro/build.sbt b/sbt-app/src/sbt-test/source-dependencies/macro/build.sbt
index 4e0809123..cd1f0fda4 100644
--- a/sbt-app/src/sbt-test/source-dependencies/macro/build.sbt
+++ b/sbt-app/src/sbt-test/source-dependencies/macro/build.sbt
@@ -1,4 +1,4 @@
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 
 val defaultSettings = Seq(
   libraryDependencies += scalaVersion("org.scala-lang" % "scala-reflect" % _ ).value
diff --git a/sbt-app/src/sbt-test/tests/arguments/build.sbt b/sbt-app/src/sbt-test/tests/arguments/build.sbt
index 1caac0210..e424bc0e4 100644
--- a/sbt-app/src/sbt-test/tests/arguments/build.sbt
+++ b/sbt-app/src/sbt-test/tests/arguments/build.sbt
@@ -1,6 +1,6 @@
 val scalatest = "org.scalatest" %% "scalatest" % "3.0.5"
 
-scalaVersion := "2.12.19"
+scalaVersion := "2.12.20"
 
 val foo = settingKey[Seq[String]]("foo")
 val checkFoo = inputKey[Unit]("check contents of foo")
diff --git a/sbt-app/src/sbt-test/tests/do-not-discover/build.sbt b/sbt-app/src/sbt-test/tests/do-not-discover/build.sbt
index 59179e413..d05f23430 100644
--- a/sbt-app/src/sbt-test/tests/do-not-discover/build.sbt
+++ b/sbt-app/src/sbt-test/tests/do-not-discover/build.sbt
@@ -1,6 +1,6 @@
 val scalatest = "org.scalatest" %% "scalatest" % "3.0.5"
 
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 
 lazy val root = (project in file("."))
   .settings(
diff --git a/sbt-app/src/sbt-test/tests/done/build.sbt b/sbt-app/src/sbt-test/tests/done/build.sbt
index 59179e413..d05f23430 100644
--- a/sbt-app/src/sbt-test/tests/done/build.sbt
+++ b/sbt-app/src/sbt-test/tests/done/build.sbt
@@ -1,6 +1,6 @@
 val scalatest = "org.scalatest" %% "scalatest" % "3.0.5"
 
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 
 lazy val root = (project in file("."))
   .settings(
diff --git a/sbt-app/src/sbt-test/tests/filter-runners/build.sbt b/sbt-app/src/sbt-test/tests/filter-runners/build.sbt
index bc17f844d..e1aba618a 100644
--- a/sbt-app/src/sbt-test/tests/filter-runners/build.sbt
+++ b/sbt-app/src/sbt-test/tests/filter-runners/build.sbt
@@ -1,7 +1,7 @@
 val scalatest = "org.scalatest" %% "scalatest" % "3.2.2"
 val munit = "org.scalameta" %% "munit" % "0.7.22"
 
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 
 libraryDependencies += scalatest % Test
 libraryDependencies += munit % Test
diff --git a/sbt-app/src/sbt-test/tests/fork-async/build.sbt b/sbt-app/src/sbt-test/tests/fork-async/build.sbt
index 1f765fdb1..93256098a 100644
--- a/sbt-app/src/sbt-test/tests/fork-async/build.sbt
+++ b/sbt-app/src/sbt-test/tests/fork-async/build.sbt
@@ -1,4 +1,4 @@
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 
 lazy val root = (project in file("."))
   .settings(
diff --git a/sbt-app/src/sbt-test/tests/fork-parallel/build.sbt b/sbt-app/src/sbt-test/tests/fork-parallel/build.sbt
index 105ef5a2c..1b8ce4210 100644
--- a/sbt-app/src/sbt-test/tests/fork-parallel/build.sbt
+++ b/sbt-app/src/sbt-test/tests/fork-parallel/build.sbt
@@ -1,7 +1,7 @@
 import Tests._
 import Defaults._
 
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 val check = taskKey[Unit]("Check that tests are executed in parallel")
 
 lazy val root = (project in file("."))
diff --git a/sbt-app/src/sbt-test/tests/fork-test-group-parallel-custom-tags/build.sbt b/sbt-app/src/sbt-test/tests/fork-test-group-parallel-custom-tags/build.sbt
index 52958f00d..9cb595477 100644
--- a/sbt-app/src/sbt-test/tests/fork-test-group-parallel-custom-tags/build.sbt
+++ b/sbt-app/src/sbt-test/tests/fork-test-group-parallel-custom-tags/build.sbt
@@ -1,5 +1,5 @@
 val specs = "org.specs2" %% "specs2-core" % "4.3.4"
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 
 val TestATypeTag = Tags.Tag("TestA")
 val TestBTypeTag = Tags.Tag("TestB")
diff --git a/sbt-app/src/sbt-test/tests/fork-test-group-parallel/build.sbt b/sbt-app/src/sbt-test/tests/fork-test-group-parallel/build.sbt
index a8345706f..f11b03e89 100644
--- a/sbt-app/src/sbt-test/tests/fork-test-group-parallel/build.sbt
+++ b/sbt-app/src/sbt-test/tests/fork-test-group-parallel/build.sbt
@@ -1,5 +1,5 @@
 val specs = "org.specs2" %% "specs2-core" % "4.3.4"
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 
 Global / concurrentRestrictions := Seq(Tags.limitAll(4))
 libraryDependencies += specs % Test
diff --git a/sbt-app/src/sbt-test/tests/fork-uncaught2/build.sbt b/sbt-app/src/sbt-test/tests/fork-uncaught2/build.sbt
index b34d2e349..4ad079bc3 100644
--- a/sbt-app/src/sbt-test/tests/fork-uncaught2/build.sbt
+++ b/sbt-app/src/sbt-test/tests/fork-uncaught2/build.sbt
@@ -1,4 +1,4 @@
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 
 libraryDependencies += "org.scala-sbt" % "test-interface" % "1.0"
 
diff --git a/sbt-app/src/sbt-test/tests/fork/build.sbt b/sbt-app/src/sbt-test/tests/fork/build.sbt
index 7a975bd9a..ba8afcd46 100644
--- a/sbt-app/src/sbt-test/tests/fork/build.sbt
+++ b/sbt-app/src/sbt-test/tests/fork/build.sbt
@@ -11,7 +11,7 @@ val scalaxml = "org.scala-lang.modules" %% "scala-xml" % "1.1.1"
 def groupId(idx: Int) = "group_" + (idx + 1)
 def groupPrefix(idx: Int) = groupId(idx) + "_file_"
 
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 ThisBuild / organization := "org.example"
 
 lazy val root = (project in file("."))
diff --git a/sbt-app/src/sbt-test/tests/fork2/build.sbt b/sbt-app/src/sbt-test/tests/fork2/build.sbt
index 17f75a03a..8e239b5da 100644
--- a/sbt-app/src/sbt-test/tests/fork2/build.sbt
+++ b/sbt-app/src/sbt-test/tests/fork2/build.sbt
@@ -1,5 +1,5 @@
 val scalatest = "org.scalatest" %% "scalatest" % "3.0.5"
 
-scalaVersion := "2.12.19"
+scalaVersion := "2.12.20"
 fork := true
 libraryDependencies += scalatest % Test
diff --git a/sbt-app/src/sbt-test/tests/it/build.sbt b/sbt-app/src/sbt-test/tests/it/build.sbt
index f784e70a1..c3c234773 100644
--- a/sbt-app/src/sbt-test/tests/it/build.sbt
+++ b/sbt-app/src/sbt-test/tests/it/build.sbt
@@ -1,4 +1,4 @@
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 
 val specs = "org.specs2" %% "specs2-core" % "4.3.4"
 
diff --git a/sbt-app/src/sbt-test/tests/junit-xml-report/build.sbt b/sbt-app/src/sbt-test/tests/junit-xml-report/build.sbt
index c63d4c94f..870d48ba4 100644
--- a/sbt-app/src/sbt-test/tests/junit-xml-report/build.sbt
+++ b/sbt-app/src/sbt-test/tests/junit-xml-report/build.sbt
@@ -6,19 +6,19 @@ val checkReport = taskKey[Unit]("Check the test reports")
 val checkNoReport = taskKey[Unit]("Check that no reports are present")
 
 val oneSecondReportFile =
-  "target/out/jvm/scala-2.12.19/root/test-reports/TEST-a.pkg.OneSecondTest.xml"
+  "target/out/jvm/scala-2.12.20/root/test-reports/TEST-a.pkg.OneSecondTest.xml"
 val failingReportFile =
-  "target/out/jvm/scala-2.12.19/root/test-reports/TEST-another.pkg.FailingTest.xml"
+  "target/out/jvm/scala-2.12.20/root/test-reports/TEST-another.pkg.FailingTest.xml"
 
 val flatSuiteReportFile =
-  "target/out/jvm/scala-2.12.19/root/test-reports/TEST-my.scalatest.MyFlatSuite.xml"
+  "target/out/jvm/scala-2.12.20/root/test-reports/TEST-my.scalatest.MyFlatSuite.xml"
 val nestedSuitesReportFile =
-  "target/out/jvm/scala-2.12.19/root/test-reports/TEST-my.scalatest.MyNestedSuites.xml"
+  "target/out/jvm/scala-2.12.20/root/test-reports/TEST-my.scalatest.MyNestedSuites.xml"
 
 val scalatest = "org.scalatest" %% "scalatest" % "3.0.5"
 val junitinterface = "com.novocode" % "junit-interface" % "0.11"
 
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 
 lazy val root = (project in file(".")).settings(
   libraryDependencies += junitinterface % Test,
diff --git a/sbt-app/src/sbt-test/tests/munit/build.sbt b/sbt-app/src/sbt-test/tests/munit/build.sbt
index bc719880c..e04350cbd 100644
--- a/sbt-app/src/sbt-test/tests/munit/build.sbt
+++ b/sbt-app/src/sbt-test/tests/munit/build.sbt
@@ -1,4 +1,4 @@
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 
 lazy val munit = "org.scalameta" %% "munit" % "0.7.22"
 
diff --git a/sbt-app/src/sbt-test/tests/nested-inproc-par/build.sbt b/sbt-app/src/sbt-test/tests/nested-inproc-par/build.sbt
index 5cbfb735e..68ae9ccf7 100644
--- a/sbt-app/src/sbt-test/tests/nested-inproc-par/build.sbt
+++ b/sbt-app/src/sbt-test/tests/nested-inproc-par/build.sbt
@@ -1,6 +1,6 @@
 val scalatest = "org.scalatest" %% "scalatest" % "3.0.5"
 
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 
 lazy val root = (project in file("."))
   .settings(
diff --git a/sbt-app/src/sbt-test/tests/nested-inproc-seq/build.sbt b/sbt-app/src/sbt-test/tests/nested-inproc-seq/build.sbt
index a03155c8a..20bdacb98 100644
--- a/sbt-app/src/sbt-test/tests/nested-inproc-seq/build.sbt
+++ b/sbt-app/src/sbt-test/tests/nested-inproc-seq/build.sbt
@@ -1,6 +1,6 @@
 val scalatest = "org.scalatest" %% "scalatest" % "3.0.5"
 
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 
 lazy val root = (project in file("."))
   .settings(
diff --git a/sbt-app/src/sbt-test/tests/nested-subproc/build.sbt b/sbt-app/src/sbt-test/tests/nested-subproc/build.sbt
index 7b8de3010..bb06cb73f 100644
--- a/sbt-app/src/sbt-test/tests/nested-subproc/build.sbt
+++ b/sbt-app/src/sbt-test/tests/nested-subproc/build.sbt
@@ -1,7 +1,7 @@
 val scalatest = "org.scalatest" %% "scalatest" % "3.0.5"
 val scalaxml = "org.scala-lang.modules" %% "scala-xml" % "1.1.1"
 
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 
 lazy val root = (project in file("."))
   .settings(
diff --git a/sbt-app/src/sbt-test/tests/nested-tests/build.sbt b/sbt-app/src/sbt-test/tests/nested-tests/build.sbt
index 6ae21f33f..52030f3c9 100644
--- a/sbt-app/src/sbt-test/tests/nested-tests/build.sbt
+++ b/sbt-app/src/sbt-test/tests/nested-tests/build.sbt
@@ -1,6 +1,6 @@
 val scalcheck = "org.scalacheck" %% "scalacheck" % "1.14.0"
 
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 ThisBuild / version := "0.0.1" 
 ThisBuild / organization := "org.catastrophe"
 
diff --git a/sbt-app/src/sbt-test/tests/one-class-multi-framework/build.sbt b/sbt-app/src/sbt-test/tests/one-class-multi-framework/build.sbt
index 3fa69b6cf..127d21076 100644
--- a/sbt-app/src/sbt-test/tests/one-class-multi-framework/build.sbt
+++ b/sbt-app/src/sbt-test/tests/one-class-multi-framework/build.sbt
@@ -1,5 +1,5 @@
 val specsJunit = "org.specs2" %% "specs2-junit" % "4.3.4"
 val junitinterface = "com.novocode" % "junit-interface" % "0.11"
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 libraryDependencies += junitinterface % Test
 libraryDependencies += specsJunit % Test
diff --git a/sbt-app/src/sbt-test/tests/order/build.sbt b/sbt-app/src/sbt-test/tests/order/build.sbt
index fefa56d8e..10db9515d 100644
--- a/sbt-app/src/sbt-test/tests/order/build.sbt
+++ b/sbt-app/src/sbt-test/tests/order/build.sbt
@@ -1,5 +1,5 @@
 val scalcheck = "org.scalacheck" %% "scalacheck" % "1.14.0"
 
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 Test / parallelExecution := false
 libraryDependencies += scalcheck % Test
diff --git a/sbt-app/src/sbt-test/tests/resources/build.sbt b/sbt-app/src/sbt-test/tests/resources/build.sbt
index 9f528a540..7d88113a4 100644
--- a/sbt-app/src/sbt-test/tests/resources/build.sbt
+++ b/sbt-app/src/sbt-test/tests/resources/build.sbt
@@ -1,3 +1,3 @@
-scalaVersion := "2.12.19"
+scalaVersion := "2.12.20"
 val specs = "org.specs2" %% "specs2-core" % "4.3.4"
 libraryDependencies += specs % Test
diff --git a/sbt-app/src/sbt-test/tests/scala-instance-classloader/build.sbt b/sbt-app/src/sbt-test/tests/scala-instance-classloader/build.sbt
index 81bcda844..3e6c71bef 100644
--- a/sbt-app/src/sbt-test/tests/scala-instance-classloader/build.sbt
+++ b/sbt-app/src/sbt-test/tests/scala-instance-classloader/build.sbt
@@ -3,7 +3,7 @@ import sbt.internal.inc.ScalaInstance
 lazy val OtherScala = config("other-scala").hide
 lazy val junitinterface = "com.novocode" % "junit-interface" % "0.11"
 lazy val akkaActor = "com.typesafe.akka" %% "akka-actor" % "2.5.17"
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 
 lazy val root = (project in file("."))
   .configs(OtherScala)
diff --git a/sbt-app/src/sbt-test/tests/serial/build.sbt b/sbt-app/src/sbt-test/tests/serial/build.sbt
index baa4751cc..5c5441ff9 100644
--- a/sbt-app/src/sbt-test/tests/serial/build.sbt
+++ b/sbt-app/src/sbt-test/tests/serial/build.sbt
@@ -1,6 +1,6 @@
 val scalatest = "org.scalatest" %% "scalatest" % "3.0.5"
 
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 ThisBuild / organization := "com.example"
 ThisBuild / version      := "0.0.1-SNAPSHOT"
 
diff --git a/sbt-app/src/sbt-test/tests/setup-cleanup/base.sbt b/sbt-app/src/sbt-test/tests/setup-cleanup/base.sbt
index ea0abf0e5..d5d9b2552 100644
--- a/sbt-app/src/sbt-test/tests/setup-cleanup/base.sbt
+++ b/sbt-app/src/sbt-test/tests/setup-cleanup/base.sbt
@@ -1,3 +1,3 @@
 val scalatest = "org.scalatest" %% "scalatest" % "3.0.5"
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 libraryDependencies += scalatest
diff --git a/sbt-app/src/sbt-test/tests/single-runner/build.sbt b/sbt-app/src/sbt-test/tests/single-runner/build.sbt
index d21cfa59e..91536a56d 100644
--- a/sbt-app/src/sbt-test/tests/single-runner/build.sbt
+++ b/sbt-app/src/sbt-test/tests/single-runner/build.sbt
@@ -1,4 +1,4 @@
 val scalatest = "org.scalatest" %% "scalatest" % "3.0.5"
-scalaVersion := "2.12.19"
+scalaVersion := "2.12.20"
 libraryDependencies += scalatest
 Test / testOptions += Tests.Argument("-C", "custom.CustomReporter")
diff --git a/sbt-app/src/sbt-test/tests/specs-run/build.sbt b/sbt-app/src/sbt-test/tests/specs-run/build.sbt
index 7b2f632b6..47774f80b 100644
--- a/sbt-app/src/sbt-test/tests/specs-run/build.sbt
+++ b/sbt-app/src/sbt-test/tests/specs-run/build.sbt
@@ -1,4 +1,4 @@
 val specs = "org.specs2" %% "specs2-core" % "4.3.4"
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 
 libraryDependencies += specs % Test
diff --git a/sbt-app/src/sbt-test/tests/t543/build.sbt b/sbt-app/src/sbt-test/tests/t543/build.sbt
index 3f885106a..944e65e4e 100644
--- a/sbt-app/src/sbt-test/tests/t543/build.sbt
+++ b/sbt-app/src/sbt-test/tests/t543/build.sbt
@@ -7,7 +7,7 @@ val check = TaskKey[Unit]("check", "Check correct error has been returned.")
 val scalatest = "org.scalatest" %% "scalatest" % "3.0.5"
 val scalaxml = "org.scala-lang.modules" %% "scala-xml" % "1.1.1"
 
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 
 lazy val root = (project in file(".")).
   settings(
diff --git a/sbt-app/src/sbt-test/tests/task/build.sbt b/sbt-app/src/sbt-test/tests/task/build.sbt
index d21cfa59e..91536a56d 100644
--- a/sbt-app/src/sbt-test/tests/task/build.sbt
+++ b/sbt-app/src/sbt-test/tests/task/build.sbt
@@ -1,4 +1,4 @@
 val scalatest = "org.scalatest" %% "scalatest" % "3.0.5"
-scalaVersion := "2.12.19"
+scalaVersion := "2.12.20"
 libraryDependencies += scalatest
 Test / testOptions += Tests.Argument("-C", "custom.CustomReporter")
diff --git a/sbt-app/src/sbt-test/tests/test-exclude/build.sbt b/sbt-app/src/sbt-test/tests/test-exclude/build.sbt
index c05ef3c0d..391cac0ae 100644
--- a/sbt-app/src/sbt-test/tests/test-exclude/build.sbt
+++ b/sbt-app/src/sbt-test/tests/test-exclude/build.sbt
@@ -1,5 +1,5 @@
 val scalatest = "org.scalatest" %% "scalatest" % "3.0.5"
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 
 lazy val root = (project in file("."))
   .settings(
diff --git a/sbt-app/src/sbt-test/tests/test-quick/build.sbt b/sbt-app/src/sbt-test/tests/test-quick/build.sbt
index 60d36d64b..2e17a434c 100644
--- a/sbt-app/src/sbt-test/tests/test-quick/build.sbt
+++ b/sbt-app/src/sbt-test/tests/test-quick/build.sbt
@@ -1,7 +1,7 @@
 Global / cacheStores := Seq.empty
 
 val scalatest = "org.scalatest" %% "scalatest" % "3.0.5"
-scalaVersion := "2.12.19"
+scalaVersion := "2.12.20"
 
 lazy val root = (project in file("."))
   .settings(
diff --git a/sbt-app/src/sbt-test/watch/commands/build.sbt b/sbt-app/src/sbt-test/watch/commands/build.sbt
index 58410762c..401b235df 100644
--- a/sbt-app/src/sbt-test/watch/commands/build.sbt
+++ b/sbt-app/src/sbt-test/watch/commands/build.sbt
@@ -53,4 +53,4 @@ expectFailure / watchOnFileInputEvent := { (_, e) =>
 }
 
 
-crossScalaVersions := Seq("2.11.12", "2.12.19")
+crossScalaVersions := Seq("2.11.12", "2.12.20")
diff --git a/server-test/src/server-test/client/build.sbt b/server-test/src/server-test/client/build.sbt
index 31faab953..8107a009d 100644
--- a/server-test/src/server-test/client/build.sbt
+++ b/server-test/src/server-test/client/build.sbt
@@ -2,7 +2,7 @@ TaskKey[Unit]("willSucceed") := println("success")
 
 TaskKey[Unit]("willFail") := { throw new Exception("failed") }
 
-scalaVersion := "2.12.19"
+scalaVersion := "2.12.20"
 libraryDependencies += "org.scalatest" %% "scalatest" % "3.0.8" % "test"
 
 TaskKey[Unit]("fooBar") := { () }
diff --git a/server-test/src/server-test/response/build.sbt b/server-test/src/server-test/response/build.sbt
index ee58de0e2..d60077a88 100644
--- a/server-test/src/server-test/response/build.sbt
+++ b/server-test/src/server-test/response/build.sbt
@@ -1,6 +1,6 @@
 import sbt.internal.server.{ ServerHandler, ServerIntent }
 
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / scalaVersion := "2.12.20"
 
 Global / serverLog / logLevel := Level.Debug
 // custom handler
diff --git a/server-test/src/test/scala/testpkg/ResponseTest.scala b/server-test/src/test/scala/testpkg/ResponseTest.scala
index 21f5a32a5..fd791ae36 100644
--- a/server-test/src/test/scala/testpkg/ResponseTest.scala
+++ b/server-test/src/test/scala/testpkg/ResponseTest.scala
@@ -19,7 +19,7 @@ class ResponseTest extends AbstractServerTest {
       if (!s.contains("systemOut"))
         println(s)
       (s contains """"id":"10"""") &&
-      (s contains "scala-library-2.12.19.jar")
+      (s contains "scala-library-2.12.20.jar")
     })
   }
 
@@ -30,7 +30,7 @@ class ResponseTest extends AbstractServerTest {
     assert(svr.waitForString(10.seconds) { s =>
       if (!s.contains("systemOut")) println(s)
       (s contains """"id":"11"""") &&
-      (s contains "scala-library-2.12.19.jar")
+      (s contains "scala-library-2.12.20.jar")
     })
   }