diff --git a/build.sbt b/build.sbt
index f463016..29e661c 100644
--- a/build.sbt
+++ b/build.sbt
@@ -21,7 +21,7 @@ ThisBuild / developers       := List(
 
 // scala versions
 val scala3       = "3.3.3"
-val scala213     = "2.13.13"
+val scala213     = "2.13.15"
 val scala212     = "2.12.19"
 val defaultScala = scala3