diff --git a/build.sbt b/build.sbt
index c418e21..4076f61 100644
--- a/build.sbt
+++ b/build.sbt
@@ -1,7 +1,7 @@
 // basics
 
 name := "scala-logging"
-crossScalaVersions := Seq("3.3.1", "2.11.12", "2.12.18", "2.13.12")
+crossScalaVersions := Seq("3.3.1", "2.11.12", "2.12.18", "2.13.13")
 scalaVersion := crossScalaVersions.value.head
 ThisBuild / versionScheme := Some("early-semver")
 scalacOptions ++= Seq(