diff --git a/build.sbt b/build.sbt
index 241e166..e0fcac7 100644
--- a/build.sbt
+++ b/build.sbt
@@ -37,7 +37,7 @@ val unusedWarnings = Seq(
   "-Ywarn-unused:imports",
 )
 
-val scala212 = "2.12.20"
+val scala212 = "2.12.21"
 
 val commonSettings = Def.settings(
   ReleasePlugin.extraReleaseCommands,