diff --git a/build.sbt b/build.sbt
index fe34822..d9a081e 100644
--- a/build.sbt
+++ b/build.sbt
@@ -1,6 +1,6 @@
 Global / onChangedBuildSource := ReloadOnSourceChanges
 
-val Scala212 = "2.12.20"
+val Scala212 = "2.12.21"
 val Scala213 = "2.13.16"
 val Scala3 = "3.3.7"