diff --git a/build.sbt b/build.sbt
index 8e4f08a..f725ebf 100644
--- a/build.sbt
+++ b/build.sbt
@@ -6,7 +6,7 @@ val groupId = "eu.timepit"
 val projectName = "fs2-cron"
 val rootPkg = s"$groupId.${projectName.replace("-", "")}"
 
-val Scala_2_12 = "2.12.20"
+val Scala_2_12 = "2.12.21"
 val Scala_2_13 = "2.13.18"
 val Scala_3 = "3.3.7"