diff --git a/build.sbt b/build.sbt
index ec977de..8292766 100644
--- a/build.sbt
+++ b/build.sbt
@@ -50,7 +50,7 @@ lazy val commonSettings = Seq(
   organization := "io.chrisdavenport",
 
   scalaVersion := "2.12.8",
-  crossScalaVersions := Seq(scalaVersion.value, "2.11.12"),
+  crossScalaVersions := Seq(scalaVersion.value, "2.13.5"),
   scalacOptions += "-Yrangepos",
 
   scalacOptions in (Compile, doc) ++= Seq(