diff --git a/build.sbt b/build.sbt
index d99ed3b..544bee2 100644
--- a/build.sbt
+++ b/build.sbt
@@ -2,7 +2,7 @@
 // import com.jsuereth.sbtpgp.PgpKeys._   // for publishSigned
 
 lazy val scala212 = "2.12.16"
-lazy val scala213 = "2.13.8"
+lazy val scala213 = "2.13.15"
 lazy val scala3   = "3.1.3"
 lazy val supportedScalaVersions = List(
   scala3,