diff --git a/build.sbt b/build.sbt
index fc38063..b4b2f39 100644
--- a/build.sbt
+++ b/build.sbt
@@ -1,4 +1,4 @@
-val ScalaVersion = "2.12.20"
+val ScalaVersion = "2.12.21"
 
 lazy val authors = project
   .in(file("."))