diff --git a/sbt/src/sbt-test/plugins/dotty-compiler-plugin/build.sbt b/sbt/src/sbt-test/plugins/dotty-compiler-plugin/build.sbt
index 8800d7a56..4d6fc4fd4 100644
--- a/sbt/src/sbt-test/plugins/dotty-compiler-plugin/build.sbt
+++ b/sbt/src/sbt-test/plugins/dotty-compiler-plugin/build.sbt
@@ -1,4 +1,4 @@
-ThisBuild / scalaVersion := "0.26.0-RC1"
+ThisBuild / scalaVersion := "0.27.0-RC1"
 
 lazy val plugin = project
   .in(file("plugin"))
diff --git a/sbt/src/sbt-test/plugins/dotty-compiler-plugin/changes/build.sbt b/sbt/src/sbt-test/plugins/dotty-compiler-plugin/changes/build.sbt
index c14f87559..50c9cf724 100644
--- a/sbt/src/sbt-test/plugins/dotty-compiler-plugin/changes/build.sbt
+++ b/sbt/src/sbt-test/plugins/dotty-compiler-plugin/changes/build.sbt
@@ -1,4 +1,4 @@
-lazy val dottyVersion = "0.14.0-RC1"
+lazy val dottyVersion = "0.27.0-RC1"
 
 lazy val plugin = project
   .in(file("plugin"))
diff --git a/sbt/src/sbt-test/plugins/dotty-compiler-plugin/project/plugins.sbt b/sbt/src/sbt-test/plugins/dotty-compiler-plugin/project/plugins.sbt
index 03ee51a21..59d5793ef 100644
--- a/sbt/src/sbt-test/plugins/dotty-compiler-plugin/project/plugins.sbt
+++ b/sbt/src/sbt-test/plugins/dotty-compiler-plugin/project/plugins.sbt
@@ -1 +1 @@
-addSbtPlugin("ch.epfl.lamp" % "sbt-dotty" % "0.4.1")
+addSbtPlugin("ch.epfl.lamp" % "sbt-dotty" % "0.4.3")
diff --git a/sbt/src/sbt-test/plugins/dotty-sandwich/build.sbt b/sbt/src/sbt-test/plugins/dotty-sandwich/build.sbt
index d814ab38b..0669df9fc 100644
--- a/sbt/src/sbt-test/plugins/dotty-sandwich/build.sbt
+++ b/sbt/src/sbt-test/plugins/dotty-sandwich/build.sbt
@@ -1,8 +1,8 @@
-ThisBuild / scalaVersion := "0.23.0"
+ThisBuild / scalaVersion := "0.27.0-RC1"
 
 ThisBuild / resolvers += "scala-integration" at "https://scala-ci.typesafe.com/artifactory/scala-integration/"
 // TODO use 2.13.4 when it's out
-lazy val scala213 = "2.13.4-bin-aeee8f0"
+lazy val scala213 = "2.13.4-bin-d526da6"
 
 lazy val root = (project in file("."))
   .aggregate(fooApp, fooCore, barApp, barCore)
diff --git a/sbt/src/sbt-test/plugins/dotty-sandwich/project/plugins.sbt b/sbt/src/sbt-test/plugins/dotty-sandwich/project/plugins.sbt
index 03ee51a21..59d5793ef 100644
--- a/sbt/src/sbt-test/plugins/dotty-sandwich/project/plugins.sbt
+++ b/sbt/src/sbt-test/plugins/dotty-sandwich/project/plugins.sbt
@@ -1 +1 @@
-addSbtPlugin("ch.epfl.lamp" % "sbt-dotty" % "0.4.1")
+addSbtPlugin("ch.epfl.lamp" % "sbt-dotty" % "0.4.3")
diff --git a/sbt/src/sbt-test/plugins/dotty/build.sbt b/sbt/src/sbt-test/plugins/dotty/build.sbt
index 5116083a5..ea167c1f8 100644
--- a/sbt/src/sbt-test/plugins/dotty/build.sbt
+++ b/sbt/src/sbt-test/plugins/dotty/build.sbt
@@ -1 +1 @@
-ThisBuild / scalaVersion := "0.26.0-RC1"
+ThisBuild / scalaVersion := "0.27.0-RC1"
diff --git a/sbt/src/sbt-test/plugins/dotty/project/plugins.sbt b/sbt/src/sbt-test/plugins/dotty/project/plugins.sbt
index 03ee51a21..59d5793ef 100644
--- a/sbt/src/sbt-test/plugins/dotty/project/plugins.sbt
+++ b/sbt/src/sbt-test/plugins/dotty/project/plugins.sbt
@@ -1 +1 @@
-addSbtPlugin("ch.epfl.lamp" % "sbt-dotty" % "0.4.1")
+addSbtPlugin("ch.epfl.lamp" % "sbt-dotty" % "0.4.3")