diff --git a/build.sbt b/build.sbt
index d959d889..2172cf23 100644
--- a/build.sbt
+++ b/build.sbt
@@ -1,4 +1,4 @@
-val scala212 = "2.12.18"
+val scala212 = "2.12.21"
 val scala213 = "2.13.12"
 val scala3 = "3.3.5"