diff --git a/build.sbt b/build.sbt
index 4a979a9..adeaf93 100644
--- a/build.sbt
+++ b/build.sbt
@@ -89,7 +89,7 @@ lazy val root = (project in file(".")).
       commitNextVersion,
       pushChanges
     ),
-    scalaVersion := "2.11.12",
+    scalaVersion := "2.13.15",
     inThisBuild(List(
       organization := "org.foundweekends.conscript",
       homepage := Some(url("https://github.com/foundweekends/conscript/")),
@@ -102,7 +102,7 @@ lazy val root = (project in file(".")).
       scmInfo := Some(ScmInfo(url("https://github.com/foundweekends/conscript"), "git@github.com:foundweekends/conscript.git"))
     )),
     name := "conscript",
-    crossScalaVersions := List("2.11.12"),
+    crossScalaVersions := List("2.13.15"),
     libraryDependencies ++= List(launcherInterface, scalaSwing, dispatchCore, scopt, liftJson, slf4jJdk14),
     Compile / packageBin / mainClass := Some("conscript.Conscript"),
     (Compile / packageBin / mappings) := {
diff --git a/sbt-conscript/src/sbt-test/cs/basic/build.sbt b/sbt-conscript/src/sbt-test/cs/basic/build.sbt
index 1c38505..9b682b0 100644
--- a/sbt-conscript/src/sbt-test/cs/basic/build.sbt
+++ b/sbt-conscript/src/sbt-test/cs/basic/build.sbt
@@ -4,7 +4,7 @@ version := "0.1.0-SNAPSHOT"
 
 libraryDependencies += "org.scala-sbt" %% "io" % "1.1.0"
 
-scalaVersion := "2.11.12"
+scalaVersion := "2.13.15"
 
 organization := "com.example"