diff --git a/build.sc b/build.sc
index 664ae455..abc86be0 100644
--- a/build.sc
+++ b/build.sc
@@ -2,7 +2,7 @@ import mill._
 import mill.scalalib._
 import mill.scalalib.publish._
 
-val ScalaVersions = Seq("2.12.20", "2.13.14")
+val ScalaVersions = Seq("2.12.20", "2.13.15")
 
 object library {