diff --git a/build.sbt b/build.sbt
index df60184..fcc5480 100644
--- a/build.sbt
+++ b/build.sbt
@@ -24,7 +24,7 @@ inThisBuild(
   )
 )
 
-lazy val scala212               = "2.12.20"
+lazy val scala212               = "2.12.21"
 lazy val scala213               = "2.13.18"
 lazy val scala3                 = "3.3.7"
 lazy val supportedScalaVersions = List(scala212, scala213, scala3)