diff --git a/build.sbt b/build.sbt
index 93bb4b693..4451c86ea 100644
--- a/build.sbt
+++ b/build.sbt
@@ -46,7 +46,7 @@ def commonSettings: Seq[Setting[_]] = Def.settings(
   // concurrentRestrictions in Global += Util.testExclusiveRestriction,
   testOptions += Tests.Argument(TestFrameworks.ScalaCheck, "-w", "1"),
   javacOptions in compile ++= Seq("-Xlint", "-Xlint:-serial"),
-  crossScalaVersions := Seq(scala212),
+  crossScalaVersions := Seq(scala212, scala213),
   resolvers += Resolver.sonatypeRepo("public"),
   scalacOptions := {
     val old = scalacOptions.value