diff --git a/build.sbt b/build.sbt
index 5bfb197a2..5589af998 100644
--- a/build.sbt
+++ b/build.sbt
@@ -73,17 +73,17 @@ def commonBaseSettings: Seq[Setting[_]] = Def.settings(
   )(Resolver.ivyStylePatterns),
   testFrameworks += TestFramework("hedgehog.sbt.Framework"),
   testFrameworks += TestFramework("verify.runner.Framework"),
-  concurrentRestrictions in Global += Util.testExclusiveRestriction,
-  testOptions in Test += Tests.Argument(TestFrameworks.ScalaCheck, "-w", "1"),
-  testOptions in Test += Tests.Argument(TestFrameworks.ScalaCheck, "-verbosity", "2"),
-  javacOptions in compile ++= Seq("-Xlint", "-Xlint:-serial"),
+  Global / concurrentRestrictions += Util.testExclusiveRestriction,
+  Test / testOptions += Tests.Argument(TestFrameworks.ScalaCheck, "-w", "1"),
+  Test / testOptions += Tests.Argument(TestFrameworks.ScalaCheck, "-verbosity", "2"),
+  compile / javacOptions ++= Seq("-Xlint", "-Xlint:-serial"),
   Compile / doc / scalacOptions ++= {
     import scala.sys.process._
     val devnull = ProcessLogger(_ => ())
     val tagOrSha = ("git describe --exact-match" #|| "git rev-parse HEAD").lineStream(devnull).head
     Seq(
       "-sourcepath",
-      (baseDirectory in LocalRootProject).value.getAbsolutePath,
+      (LocalRootProject / baseDirectory).value.getAbsolutePath,
       "-doc-source-url",
       s"https://github.com/sbt/sbt/tree/$tagOrSha€{FILE_PATH}.scala"
     )
@@ -99,8 +99,8 @@ def commonBaseSettings: Seq[Setting[_]] = Def.settings(
   Test / unmanagedSources / inputFileStamps :=
     (Test / unmanagedSources / inputFileStamps).dependsOn(Test / javafmtOnCompile).value,
   crossScalaVersions := List(scala212, scala213),
-  publishArtifact in Test := false,
-  fork in run := true,
+  Test / publishArtifact := false,
+  run / fork := true,
 )
 def commonSettings: Seq[Setting[_]] =
   commonBaseSettings :+
@@ -118,7 +118,12 @@ def baseSettings: Seq[Setting[_]] =
 def testedBaseSettings: Seq[Setting[_]] =
   baseSettings ++ testDependencies
 
-val sbt13Plus = Seq("1.3.0")
+val sbt13Plus =
+  Seq(
+    "1.3.0",
+    "1.4.0",
+    "1.5.0",
+  )
 val sbt10Plus =
   Seq(
     "1.0.0",
@@ -191,8 +196,8 @@ lazy val sbtRoot: Project = (project in file("."))
     Transform.conscriptSettings(bundledLauncherProj),
     publish := {},
     publishLocal := {},
-    skip in publish := true,
-    commands in Global += Command
+    publish / skip := true,
+    Global / commands += Command
       .single("sbtOn")((state, dir) => s"sbtProj/test:runMain sbt.RunFromSourceMain $dir" :: state),
     mimaSettings,
     mimaPreviousArtifacts := Set.empty,
@@ -232,7 +237,7 @@ lazy val bundledLauncherProj =
       description := "sbt application launcher",
       autoScalaLibrary := false,
       crossPaths := false,
-      packageBin in Compile := sbtLaunchJar.value,
+      Compile / packageBin := sbtLaunchJar.value,
       mimaSettings,
       mimaPreviousArtifacts := Set()
     )
@@ -369,11 +374,11 @@ lazy val utilLogging = (project in file("internal") / "util-logging")
       case v if v.startsWith("2.12.") => List("-Ywarn-unused:-locals,-explicits,-privates")
       case _                          => List()
     }),
-    sourceManaged in (Compile, generateContrabands) := baseDirectory.value / "src" / "main" / "contraband-scala",
-    managedSourceDirectories in Compile +=
+    Compile / generateContrabands / sourceManaged := baseDirectory.value / "src" / "main" / "contraband-scala",
+    Compile / managedSourceDirectories +=
       baseDirectory.value / "src" / "main" / "contraband-scala",
-    contrabandFormatsForType in generateContrabands in Compile := { tpe =>
-      val old = (contrabandFormatsForType in generateContrabands in Compile).value
+    Compile / generateContrabands / contrabandFormatsForType := { tpe =>
+      val old = (Compile / generateContrabands / contrabandFormatsForType).value
       val name = tpe.removeTypeParameters.name
       if (name == "Throwable") Nil
       else old(tpe)
@@ -407,6 +412,7 @@ lazy val utilLogging = (project in file("internal") / "util-logging")
       exclude[IncompatibleSignatureProblem]("sbt.internal.util.MainAppender*"),
       exclude[MissingTypesProblem]("sbt.internal.util.ConsoleAppender"),
       exclude[MissingTypesProblem]("sbt.internal.util.BufferedAppender"),
+      exclude[MissingClassProblem]("sbt.internal.util.Terminal$BlockingInputStream$"),
     ),
   )
   .configure(addSbtIO)
@@ -475,10 +481,10 @@ lazy val testingProj = (project in file("testing"))
       sjsonNewScalaJson.value
     ),
     Compile / scalacOptions += "-Ywarn-unused:-locals,-explicits,-privates",
-    managedSourceDirectories in Compile +=
+    Compile / managedSourceDirectories +=
       baseDirectory.value / "src" / "main" / "contraband-scala",
-    sourceManaged in (Compile, generateContrabands) := baseDirectory.value / "src" / "main" / "contraband-scala",
-    contrabandFormatsForType in generateContrabands in Compile := ContrabandConfig.getFormats,
+    Compile / generateContrabands / sourceManaged := baseDirectory.value / "src" / "main" / "contraband-scala",
+    Compile / generateContrabands / contrabandFormatsForType := ContrabandConfig.getFormats,
     mimaSettings,
     mimaBinaryIssueFilters ++= Seq(
       // private[sbt]
@@ -559,6 +565,7 @@ lazy val stdTaskProj = (project in file("tasks-standard"))
     mimaBinaryIssueFilters ++= Seq(
       // unused private[sbt]
       exclude[DirectMissingMethodProblem]("sbt.Task.mapTask"),
+      exclude[NewMixinForwarderProblem]("sbt.std.TaskExtra.joinAnyTasks"),
     ),
   )
   .configure(addSbtIO)
@@ -571,9 +578,9 @@ lazy val runProj = (project in file("run"))
     testedBaseSettings,
     name := "Run",
     Compile / scalacOptions += "-Ywarn-unused:-locals,-explicits,-privates",
-    managedSourceDirectories in Compile +=
+    Compile / managedSourceDirectories +=
       baseDirectory.value / "src" / "main" / "contraband-scala",
-    sourceManaged in (Compile, generateContrabands) := baseDirectory.value / "src" / "main" / "contraband-scala",
+    Compile / generateContrabands / sourceManaged := baseDirectory.value / "src" / "main" / "contraband-scala",
     mimaSettings,
     mimaBinaryIssueFilters ++= Seq(
       // copy method was never meant to be public
@@ -668,6 +675,7 @@ lazy val actionsProj = (project in file("main-actions"))
       exclude[DirectMissingMethodProblem]("sbt.Doc.generate"),
       exclude[DirectMissingMethodProblem]("sbt.compiler.Eval.filesModifiedBytes"),
       exclude[DirectMissingMethodProblem]("sbt.compiler.Eval.fileModifiedBytes"),
+      exclude[DirectMissingMethodProblem]("sbt.Doc.$init$"),
     ),
   )
   .configure(
@@ -687,10 +695,10 @@ lazy val protocolProj = (project in file("protocol"))
     name := "Protocol",
     libraryDependencies ++= Seq(sjsonNewScalaJson.value, ipcSocket),
     Compile / scalacOptions += "-Ywarn-unused:-locals,-explicits,-privates",
-    managedSourceDirectories in Compile +=
+    Compile / managedSourceDirectories +=
       baseDirectory.value / "src" / "main" / "contraband-scala",
-    sourceManaged in (Compile, generateContrabands) := baseDirectory.value / "src" / "main" / "contraband-scala",
-    contrabandFormatsForType in generateContrabands in Compile := ContrabandConfig.getFormats,
+    Compile / generateContrabands / sourceManaged := baseDirectory.value / "src" / "main" / "contraband-scala",
+    Compile / generateContrabands / contrabandFormatsForType := ContrabandConfig.getFormats,
     mimaSettings,
     mimaBinaryIssueFilters ++= Seq(
       // copy method was never meant to be public
@@ -729,10 +737,10 @@ lazy val commandProj = (project in file("main-command"))
     name := "Command",
     libraryDependencies ++= Seq(launcherInterface, sjsonNewScalaJson.value, templateResolverApi),
     Compile / scalacOptions += "-Ywarn-unused:-locals,-explicits,-privates",
-    managedSourceDirectories in Compile +=
+    Compile / managedSourceDirectories +=
       baseDirectory.value / "src" / "main" / "contraband-scala",
-    sourceManaged in (Compile, generateContrabands) := baseDirectory.value / "src" / "main" / "contraband-scala",
-    contrabandFormatsForType in generateContrabands in Compile := ContrabandConfig.getFormats,
+    Compile / generateContrabands / sourceManaged := baseDirectory.value / "src" / "main" / "contraband-scala",
+    Compile / generateContrabands / contrabandFormatsForType := ContrabandConfig.getFormats,
     mimaSettings,
     mimaBinaryIssueFilters ++= Vector(
       exclude[DirectMissingMethodProblem]("sbt.Exit.apply"),
@@ -766,8 +774,8 @@ lazy val commandProj = (project in file("main-command"))
       exclude[MissingTypesProblem]("sbt.internal.server.ServerConnection*"),
       exclude[IncompatibleSignatureProblem]("sbt.internal.server.ServerConnection.*")
     ),
-    unmanagedSources in (Compile, headerCreate) := {
-      val old = (unmanagedSources in (Compile, headerCreate)).value
+    Compile / headerCreate / unmanagedSources := {
+      val old = (Compile / headerCreate / unmanagedSources).value
       old filterNot { x =>
         (x.getName startsWith "NG") || (x.getName == "ReferenceCountedFileDescriptor.java")
       }
@@ -807,7 +815,7 @@ lazy val mainSettingsProj = (project in file("main-settings"))
   .settings(
     testedBaseSettings,
     name := "Main Settings",
-    testOptions in Test ++= {
+    Test / testOptions ++= {
       val cp = (Test / fullClasspathAsJars).value.map(_.data).mkString(java.io.File.pathSeparator)
       val framework = TestFrameworks.ScalaTest
       Tests.Argument(framework, s"-Dsbt.server.classpath=$cp") ::
@@ -861,7 +869,7 @@ lazy val zincLmIntegrationProj = (project in file("zinc-lm-integration"))
   .settings(
     name := "Zinc LM Integration",
     testedBaseSettings,
-    testOptions in Test +=
+    Test / testOptions +=
       Tests.Argument(TestFrameworks.ScalaTest, s"-Dsbt.zinc.version=$zincVersion"),
     mimaSettingsSince(sbt13Plus),
     mimaBinaryIssueFilters ++= Seq(
@@ -870,6 +878,7 @@ lazy val zincLmIntegrationProj = (project in file("zinc-lm-integration"))
       exclude[IncompatibleSignatureProblem]("sbt.internal.inc.ZincLMHelper.update"),
     ),
     libraryDependencies += launcherInterface,
+    Test / fork := true,
   )
   .configure(addSbtZincCompileCore, addSbtLmCore, addSbtLmIvyTest)
 
@@ -903,11 +912,12 @@ lazy val mainProj = (project in file("main"))
       case v if v.startsWith("2.12.") => List()
       case _                          => List(scalaPar)
     }),
-    managedSourceDirectories in Compile +=
+    Compile / managedSourceDirectories +=
       baseDirectory.value / "src" / "main" / "contraband-scala",
-    sourceManaged in (Compile, generateContrabands) := baseDirectory.value / "src" / "main" / "contraband-scala",
-    testOptions in Test += Tests
+    Compile / generateContrabands / sourceManaged := baseDirectory.value / "src" / "main" / "contraband-scala",
+    Test / testOptions += Tests
       .Argument(TestFrameworks.ScalaCheck, "-minSuccessfulTests", "1000"),
+    Test / fork := true,
     SettingKey[Boolean]("usePipelining") := false,
     mimaSettings,
     mimaBinaryIssueFilters ++= Vector(
@@ -1025,6 +1035,10 @@ lazy val mainProj = (project in file("main"))
       exclude[IncompatibleSignatureProblem]("sbt.internal.Act.taskAxis"),
       // private[sbt] method, used to call the correct sourcePositionMapper
       exclude[DirectMissingMethodProblem]("sbt.Defaults.foldMappers"),
+      exclude[DirectMissingMethodProblem]("sbt.Defaults.toAbsoluteSourceMapper"),
+      exclude[DirectMissingMethodProblem]("sbt.Defaults.earlyArtifactPathSetting"),
+      exclude[MissingClassProblem]("sbt.internal.server.BuildServerReporter$"),
+      exclude[IncompatibleTemplateDefProblem]("sbt.internal.server.BuildServerReporter"),
     )
   )
   .configure(
@@ -1059,7 +1073,7 @@ lazy val sbtProj = (project in file("sbt-app"))
     Test / run / connectInput := true,
     Test / run / outputStrategy := Some(StdoutOutput),
     Test / run / fork := true,
-    testOptions in Test ++= {
+    Test / testOptions ++= {
       val cp = (Test / fullClasspathAsJars).value.map(_.data).mkString(java.io.File.pathSeparator)
       val framework = TestFrameworks.ScalaTest
       Tests.Argument(framework, s"-Dsbt.server.classpath=$cp") ::
@@ -1302,6 +1316,8 @@ lazy val sbtIgnoredProblems = {
     exclude[ReversedMissingMethodProblem]("sbt.Import.sbt$Import$_setter_$SemanticSelector_="),
     // Dropped in favour of plain scala.Function, and its compose method
     exclude[DirectMissingMethodProblem]("sbt.package.toFn1"),
+    exclude[NewMixinForwarderProblem]("sbt.IOSyntax1.singleFileFinder"),
+    exclude[DirectMissingMethodProblem]("sbt.IOSyntax1.$init$"),
   )
 }
 
@@ -1320,8 +1336,8 @@ lazy val vscodePlugin = (project in file("vscode-sbt-scala"))
     bspEnabled := false,
     crossPaths := false,
     crossScalaVersions := Seq(baseScalaVersion),
-    skip in publish := true,
-    compile in Compile := {
+    publish / skip := true,
+    Compile / compile := {
       val _ = update.value
       runNpm("run compile", baseDirectory.value, streams.value.log)
       sbt.internal.inc.Analysis.empty
@@ -1355,7 +1371,7 @@ def scriptedTask(launch: Boolean): Def.Initialize[InputTask[Unit]] = Def.inputTa
   val _ = publishLocalBinAll.value
   val launchJar = s"-Dsbt.launch.jar=${(bundledLauncherProj / Compile / packageBin).value}"
   Scripted.doScripted(
-    (scalaInstance in scriptedSbtReduxProj).value,
+    (scriptedSbtReduxProj / scalaInstance).value,
     scriptedSource.value,
     scriptedBufferLog.value,
     Def.setting(Scripted.scriptedParser(scriptedSource.value)).parsed,
@@ -1421,9 +1437,9 @@ def otherRootSettings =
   Seq(
     scripted := scriptedTask(false).evaluated,
     scriptedUnpublished := scriptedTask(false).evaluated,
-    scriptedSource := (sourceDirectory in sbtProj).value / "sbt-test",
-    watchTriggers in scripted += scriptedSource.value.toGlob / **,
-    watchTriggers in scriptedUnpublished := (watchTriggers in scripted).value,
+    scriptedSource := (sbtProj / sourceDirectory).value / "sbt-test",
+    scripted / watchTriggers += scriptedSource.value.toGlob / **,
+    scriptedUnpublished / watchTriggers := (scripted / watchTriggers).value,
     scriptedLaunchOpts := List("-Xmx1500M", "-Xms512M", "-server") :::
       (sys.props.get("sbt.ivy.home") match {
         case Some(home) => List(s"-Dsbt.ivy.home=$home")
@@ -1447,7 +1463,7 @@ def otherRootSettings =
         }),
       scripted := scriptedTask(true).evaluated,
       scriptedUnpublished := scriptedTask(true).evaluated,
-      scriptedSource := (sourceDirectory in sbtProj).value / "repo-override-test"
+      scriptedSource := (sbtProj / sourceDirectory).value / "repo-override-test"
     )
   )
 
@@ -1501,8 +1517,8 @@ def customCommands: Seq[Setting[_]] = Seq(
       (lmOpt map { case ProjectRef(build, _)          => "{" + build.toString + "}/publishLocal" }).toList :::
       (zincOpt map {
         case ProjectRef(build, _) =>
-          val zincSv = get(scalaVersion in ProjectRef(build, "zinc"))
-          val csv = get(crossScalaVersions in ProjectRef(build, "compilerBridge")).toList
+          val zincSv = get((ProjectRef(build, "zinc") / scalaVersion))
+          val csv = get((ProjectRef(build, "compilerBridge") / crossScalaVersions)).toList
           (csv flatMap { bridgeSv =>
             s"++$bridgeSv" :: ("{" + build.toString + "}compilerBridge/publishLocal") :: Nil
           }) :::
diff --git a/project/HouseRulesPlugin.scala b/project/HouseRulesPlugin.scala
index 42d1c2e6d..4a0b9fa1e 100644
--- a/project/HouseRulesPlugin.scala
+++ b/project/HouseRulesPlugin.scala
@@ -30,7 +30,7 @@ object HouseRulesPlugin extends AutoPlugin {
     scalacOptions += "-Ywarn-value-discard",
     scalacOptions ++= "-Ywarn-unused-import".ifScala(v => 11 <= v && v <= 12).value.toList
   ) ++ Seq(Compile, Test).flatMap(
-    c => scalacOptions in (c, console) --= Seq("-Ywarn-unused-import", "-Xlint")
+    c => (c / console / scalacOptions) --= Seq("-Ywarn-unused-import", "-Xlint")
   )
 
   private def scalaPartV = Def setting (CrossVersion partialVersion scalaVersion.value)
diff --git a/project/PublishBinPlugin.scala b/project/PublishBinPlugin.scala
index 804f6461a..5e5397c4b 100644
--- a/project/PublishBinPlugin.scala
+++ b/project/PublishBinPlugin.scala
@@ -27,8 +27,8 @@ object PublishBinPlugin extends AutoPlugin {
       Classpaths.deliverPattern(crossTarget.value),
       if (isSnapshot.value) "integration" else "release",
       ivyConfigurations.value.map(c => ConfigRef(c.name)).toVector,
-      (packagedArtifacts in publishLocalBin).value.toVector,
-      (checksums in publishLocalBin).value.toVector,
+      (publishLocalBin / packagedArtifacts).value.toVector,
+      (publishLocalBin / checksums).value.toVector,
       logging = ivyLoggingLevel.value,
       overwrite = isSnapshot.value
     ),
@@ -59,9 +59,9 @@ object PublishBinPlugin extends AutoPlugin {
       dummyFile
     },
     dummyDoc / packagedArtifact := (Compile / packageDoc / artifact).value -> dummyDoc.value,
-    packagedArtifacts in publishLocalBin :=
+    publishLocalBin / packagedArtifacts :=
       Classpaths
-        .packaged(Seq(packageBin in Compile, packageSrc in Compile, makePom, dummyDoc))
+        .packaged(Seq(Compile / packageBin, Compile / packageSrc, makePom, dummyDoc))
         .value
   )
 }
diff --git a/project/SbtLauncherPlugin.scala b/project/SbtLauncherPlugin.scala
index 0c24d2de5..65f9f2e67 100644
--- a/project/SbtLauncherPlugin.scala
+++ b/project/SbtLauncherPlugin.scala
@@ -26,7 +26,7 @@ object SbtLauncherPlugin extends AutoPlugin {
       }
     },
     sbtLaunchJar := {
-      val propFiles = (resources in Compile).value
+      val propFiles = (Compile / resources).value
       val propFileLocations =
         for (file <- propFiles; if file.getName != "resources") yield {
           if (file.getName == "sbt.boot.properties") "sbt/sbt.boot.properties" -> file
diff --git a/project/Util.scala b/project/Util.scala
index 8618f206d..cf8b75cc8 100644
--- a/project/Util.scala
+++ b/project/Util.scala
@@ -22,7 +22,7 @@ object Util {
   lazy val javaOnlySettings: Seq[Setting[_]] = Seq(
     // crossPaths := false,
     // compileOrder := CompileOrder.JavaThenScala,
-    unmanagedSourceDirectories in Compile := Seq((javaSource in Compile).value)
+    Compile / unmanagedSourceDirectories := Seq((Compile / javaSource).value)
   )
 
   lazy val baseScalacOptions = Seq(
@@ -131,7 +131,7 @@ object Util {
 
   def excludePomArtifact(artifactId: String) = (artifactId startsWith "compiler-bridge")
 
-  val testExclusive = tags in test += ((ExclusiveTest, 1))
+  val testExclusive = test / tags += (ExclusiveTest, 1)
 
   // TODO: replace with Tags.exclusive after 0.12.0
   val testExclusiveRestriction = Tags.customLimit { (tags: Map[Tags.Tag, Int]) =>
@@ -184,9 +184,9 @@ object Licensed {
 
   def settings: Seq[Setting[_]] = Seq(
     notice := (baseDirectory.value / "NOTICE"),
-    unmanagedResources in Compile ++= notice.value +: extractLicenses.value,
+    Compile / unmanagedResources ++= notice.value +: extractLicenses.value,
     extractLicenses := extractLicenses0(
-      (baseDirectory in ThisBuild).value,
+      (ThisBuild / baseDirectory).value,
       notice.value,
       streams.value
     )
diff --git a/project/build.properties b/project/build.properties
index dbae93bcf..f0be67b9f 100644
--- a/project/build.properties
+++ b/project/build.properties
@@ -1 +1 @@
-sbt.version=1.4.9
+sbt.version=1.5.1
diff --git a/project/plugins.sbt b/project/plugins.sbt
index 6fd8635fe..245e11f02 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -9,5 +9,5 @@ addSbtPlugin("org.scala-sbt" % "sbt-contraband" % "0.5.1")
 addSbtPlugin("de.heikoseeberger" % "sbt-header" % "3.0.2")
 addSbtPlugin("com.lightbend" % "sbt-whitesource" % "0.1.14")
 addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.14.9")
-addSbtPlugin("com.typesafe" % "sbt-mima-plugin" % "0.6.1")
+addSbtPlugin("com.typesafe" % "sbt-mima-plugin" % "0.8.1")
 addSbtPlugin("com.swoval" % "sbt-java-format" % "0.3.1")