diff --git a/project/plugins.sbt b/project/plugins.sbt
index e419220..7461ae7 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -1,5 +1,5 @@
 val scalaJSVersion =
-  Option(System.getenv("SCALAJS_VERSION")).getOrElse("1.3.1")
+  Option(System.getenv("SCALAJS_VERSION")).getOrElse("1.4.0")
 
 addSbtPlugin("org.scala-js" % "sbt-scalajs" % scalaJSVersion)