diff --git a/build.sbt b/build.sbt
index 812787e..16d7edc 100644
--- a/build.sbt
+++ b/build.sbt
@@ -3,7 +3,7 @@ name := "query-monad-code"
 version := "1.0-SNAPSHOT"
 
 ThisBuild / scalaVersion := "2.12.10"
-ThisBuild / crossScalaVersions := Seq("2.11.12", "2.12.10")
+ThisBuild / crossScalaVersions := Seq("2.13.5", "2.12.10")
 
 def scalacOptionsVersion(scalaVersion: String) = {
   val defaultOptions = Seq(