diff --git a/build.sbt b/build.sbt
index 6ab70abbe..285705b22 100644
--- a/build.sbt
+++ b/build.sbt
@@ -2,8 +2,8 @@ import ScalaModulePlugin._
 
 scalaVersionsByJvm in ThisBuild := {
   val v211 = "2.11.12"
-  val v212 = "2.12.4"
-  val v213 = "2.13.0-M3"
+  val v212 = "2.12.6"
+  val v213 = "2.13.0-M4"
   Map(
     6 -> List(v211 -> true),
     7 -> List(v211 -> false),
diff --git a/project/plugins.sbt b/project/plugins.sbt
index fdd0d207a..66658960a 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -1,3 +1,3 @@
 addSbtPlugin("org.scala-lang.modules" % "sbt-scala-module" % "1.0.14")
 
-addSbtPlugin("org.scala-js" % "sbt-scalajs" % "0.6.22")
+addSbtPlugin("org.scala-js" % "sbt-scalajs" % "0.6.23")