diff --git a/build.sbt b/build.sbt
index bf97d68..bf03954 100644
--- a/build.sbt
+++ b/build.sbt
@@ -2,7 +2,7 @@ import com.softwaremill.SbtSoftwareMillBrowserTestJS._
 import com.softwaremill.SbtSoftwareMillCommon.commonSmlBuildSettings
 import com.softwaremill.Publish.ossPublishSettings
 
-val scala2_12 = "2.12.20"
+val scala2_12 = "2.12.21"
 val scala2_13 = "2.13.18"
 val scala2 = List(scala2_12, scala2_13)
 val scala3 = List("3.3.7")