diff --git a/.travis.yml b/.travis.yml
index 6b8b848..0790764 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,10 +4,10 @@ scala:
   - 2.13.0
 
 env:
-  - SCALAJS_VERSION=         ADOPTOPENJDK=8
-  - SCALAJS_VERSION=0.6.29   ADOPTOPENJDK=8
-  - SCALAJS_VERSION=1.0.0-M8 ADOPTOPENJDK=8
-  - SCALAJS_VERSION=         ADOPTOPENJDK=11
+  - SCALAJS_VERSION=          ADOPTOPENJDK=8
+  - SCALAJS_VERSION=0.6.31    ADOPTOPENJDK=8
+  - SCALAJS_VERSION=1.0.0-RC2 ADOPTOPENJDK=8
+  - SCALAJS_VERSION=          ADOPTOPENJDK=11
 
 before_install:
   # adding $HOME/.sdkman to cache would create an empty directory, which interferes with the initial installation
diff --git a/project/build.properties b/project/build.properties
index abfd235..5cad107 100644
--- a/project/build.properties
+++ b/project/build.properties
@@ -1,2 +1,2 @@
 # Not 1.3.0 due to https://github.com/sbt/sbt/issues/5043
-sbt.version=1.2.8
+sbt.version=1.3.5
diff --git a/project/plugins.sbt b/project/plugins.sbt
index 649ce0f..bc92150 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -1,7 +1,7 @@
 val scalaJSVersion =
-  Option(System.getenv("SCALAJS_VERSION")).filter(_.nonEmpty).getOrElse("0.6.29")
+  Option(System.getenv("SCALAJS_VERSION")).filter(_.nonEmpty).getOrElse("0.6.31")
 
-addSbtPlugin("org.scala-lang.modules" % "sbt-scala-module" % "2.1.2")
+addSbtPlugin("org.scala-lang.modules" % "sbt-scala-module" % "2.1.3")
 
 addSbtPlugin("org.portable-scala" % "sbt-scalajs-crossproject" % "0.6.1")
 addSbtPlugin("org.scala-js" % "sbt-scalajs" % scalaJSVersion)