diff --git a/build.sbt b/build.sbt
index fb96d5e..e310501 100644
--- a/build.sbt
+++ b/build.sbt
@@ -2,7 +2,7 @@ organization := "com.soundcloud"
 
 name := "spark-pagerank"
 
-scalaVersion := "2.12.8"
+scalaVersion := "2.12.21"
 
 crossScalaVersions := Seq("2.11.12", "2.12.8")