diff --git a/.travis.yml b/.travis.yml
index 897b4aa2..b837bf8f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -13,7 +13,7 @@ scala:
 
 env:
   - ADOPTOPENJDK=8     SCALAJS_VERSION=       CACHE_WORKAROUND=see-PR-335
-  - ADOPTOPENJDK=8     SCALAJS_VERSION=1.5.1  CACHE_WORKAROUND=see-PR-335
+  - ADOPTOPENJDK=8     SCALAJS_VERSION=1.6.0  CACHE_WORKAROUND=see-PR-335
   - ADOPTOPENJDK=11    SCALAJS_VERSION=       CACHE_WORKAROUND=see-PR-335
 
 matrix:
diff --git a/build.sbt b/build.sbt
index 2709b03f..4a0c15fe 100644
--- a/build.sbt
+++ b/build.sbt
@@ -3,7 +3,9 @@ lazy val root = project.in(file("."))
   .settings(
     publish / skip := true,
     ThisBuild / versionScheme := Some("early-semver"),
-    ThisBuild / versionPolicyIntention := Compatibility.BinaryAndSourceCompatible
+    ThisBuild / versionPolicyIntention := Compatibility.BinaryCompatible,
+    // because it doesn't declare it itself
+    ThisBuild / versionPolicyDependencySchemes += "org.scala-js" %% "scalajs-library" % "semver-spec"
   )
 
 lazy val parserCombinators = crossProject(JVMPlatform, JSPlatform, NativePlatform)
diff --git a/project/plugins.sbt b/project/plugins.sbt
index e0f9a304..c70d8fc7 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -1,5 +1,5 @@
 val scalaJSVersion =
-  Option(System.getenv("SCALAJS_VERSION")).filter(_.nonEmpty).getOrElse("1.5.1")
+  Option(System.getenv("SCALAJS_VERSION")).filter(_.nonEmpty).getOrElse("1.6.0")
 
 val scalaNativeVersion =
   Option(System.getenv("SCALANATIVE_VERSION")).filter(_.nonEmpty).getOrElse("0.4.0")