diff --git a/build.sbt b/build.sbt
index 3e626e9..0c0dd42 100644
--- a/build.sbt
+++ b/build.sbt
@@ -3,7 +3,7 @@ import sbtcrossproject.CrossPlugin.autoImport.{crossProject, CrossType}
 // Scala versions
 val scala213 = "2.13.17"
 
-val scala212 = "2.12.20"
+val scala212 = "2.12.21"
 
 val scala3 = List("3.3.7")