diff --git a/build.sbt b/build.sbt
index a49add0..abae949 100755
--- a/build.sbt
+++ b/build.sbt
@@ -1,7 +1,7 @@
 ThisBuild / organization       := "org.scala-exercises"
 ThisBuild / githubOrganization := "47degrees"
 ThisBuild / scalaVersion       := "2.13.3"
-ThisBuild / crossScalaVersions := Seq("2.13.3", "2.12.11")
+ThisBuild / crossScalaVersions := Seq("2.13.3", "2.12.15")
 
 publish / skip := true