diff --git a/build.sc b/build.sc
index 8a4f9a6..9ab2e22 100644
--- a/build.sc
+++ b/build.sc
@@ -8,7 +8,7 @@ import mill.scalalib.api.ZincWorkerUtil.isScala3
 val communityBuildDottyVersion = sys.props.get("dottyVersion").toList
 
 val scala212 = "2.12.19"
-val scala213 = "2.13.13"
+val scala213 = "2.13.15"
 val scala3 = "3.3.3"
 
 val scalaVersions = scala3 :: scala213 :: scala212 :: communityBuildDottyVersion