diff --git a/build.sbt b/build.sbt
index 8dcc1003..3843313b 100644
--- a/build.sbt
+++ b/build.sbt
@@ -33,7 +33,7 @@ ThisBuild / tlSitePublishBranch := Some("main")
 ThisBuild / githubWorkflowJavaVersions := Seq(JavaSpec.temurin("11"))
 
 val scala212 = "2.12.19"
-val scala213 = "2.13.12"
+val scala213 = "2.13.15"
 ThisBuild / crossScalaVersions := Seq(scala212, scala213, "3.3.3")
 ThisBuild / scalaVersion       := scala213 // the default Scala