diff --git a/build.sbt b/build.sbt
index 3028891..2526a5e 100644
--- a/build.sbt
+++ b/build.sbt
@@ -5,7 +5,7 @@ lazy val finagleVersion = "19.8.0"
 lazy val buildSettings = Seq(
   organization := "com.github.finagle",
   scalaVersion := "2.12.7",
-  crossScalaVersions := Seq("2.11.12", "2.12.7")
+  crossScalaVersions := Seq("2.13.5", "2.12.7")
 )
 
 val baseSettings = Seq(