diff --git a/.travis.yml b/.travis.yml
index 8a6a7878d..bdf6d828a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -28,4 +28,5 @@ env:
     - PLATFORM=jvm SBT_PARALLEL=true  WORKERS=4 DEPLOY=false
     - PLATFORM=jvm SBT_PARALLEL=false WORKERS=4 DEPLOY=false
     - PLATFORM=js  SBT_PARALLEL=true  WORKERS=1 DEPLOY=true
+    - PLATFORM=js  SBT_PARALLEL=true  WORKERS=1 DEPLOY=true SCALAJS_VERSION=1.0.0-M1
 sudo: false
diff --git a/project/plugin.sbt b/project/plugin.sbt
index 0a20bf942..c144ef57b 100644
--- a/project/plugin.sbt
+++ b/project/plugin.sbt
@@ -2,6 +2,9 @@ addSbtPlugin("com.typesafe" % "sbt-mima-plugin" % "0.1.14")
 
 addSbtPlugin("com.jsuereth" % "sbt-pgp" % "1.0.0")
 
-addSbtPlugin("org.scala-js" % "sbt-scalajs" % "0.6.19")
+val scalaJSVersion =
+  Option(System.getenv("SCALAJS_VERSION")).getOrElse("0.6.19")
+
+addSbtPlugin("org.scala-js" % "sbt-scalajs" % scalaJSVersion)
 
 scalacOptions += "-deprecation"