diff --git a/build.sbt b/build.sbt
index d3456d7..169d9ee 100644
--- a/build.sbt
+++ b/build.sbt
@@ -1,4 +1,4 @@
-val Scala212 = "2.12.20"
+val Scala212 = "2.12.21"
 val Scala213 = "2.13.18"
 val Scala3 = "3.3.7"