diff --git a/build.sbt b/build.sbt
index aedf2bf..0e3cf7d 100644
--- a/build.sbt
+++ b/build.sbt
@@ -17,7 +17,7 @@ ThisBuild / tlSonatypeUseLegacyHost := false
 // publish website from this branch
 ThisBuild / tlSitePublishBranch := Some("main")
 
-val Scala213 = "2.13.12"
+val Scala213 = "2.13.13"
 ThisBuild / crossScalaVersions := Seq(Scala213, "3.3.1")
 ThisBuild / scalaVersion := Scala213 // the default Scala