diff --git a/build.sbt b/build.sbt
index 803162d..80e22e7 100644
--- a/build.sbt
+++ b/build.sbt
@@ -18,7 +18,7 @@ val unusedWarnings = Seq(
   "-Ywarn-unused",
 )
 
-val Scala212 = "2.12.20"
+val Scala212 = "2.12.21"
 val Scala3 = "3.3.7"
 
 lazy val commonSettings = Def.settings(