diff --git a/build.sbt b/build.sbt
index c2e3a1e..24a4f06 100644
--- a/build.sbt
+++ b/build.sbt
@@ -13,7 +13,7 @@ ThisBuild / developers := List(
 // publish website from this branch
 ThisBuild / tlSitePublishBranch := Some("main")
 
-val Scala213 = "2.13.17"
+val Scala213 = "2.13.18"
 ThisBuild / crossScalaVersions := Seq("2.12.20", Scala213, "3.3.7")
 ThisBuild / scalaVersion := Scala213 // the default Scala