diff --git a/.circleci/config.yml b/.circleci/config.yml
index 222a351b..21524f3d 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -10,7 +10,7 @@ executors:
       - image: cimg/openjdk:17.0
     resource_class: medium+
     environment:
-      SCALA_VERSION: 2.12.20
+      SCALA_VERSION: 2.12.21
   scala_213:
     docker:
       - image: cimg/openjdk:17.0
diff --git a/build.sbt b/build.sbt
index 3cfa2cb2..00b2f560 100644
--- a/build.sbt
+++ b/build.sbt
@@ -50,7 +50,7 @@ val commonSettings = Sonatype.sonatypeSettings ++ releaseSettings ++ Seq(
   organization := "com.spotify",
   name := "ratatool",
   description := "A tool for random data sampling and generation",
-  scalaVersion := "2.12.20",
+  scalaVersion := "2.12.21",
   crossScalaVersions := Seq(scalaVersion.value, "2.13.16"),
   resolvers ++= Resolver.sonatypeOssRepos("public"),
   resolvers ++= Resolver.sonatypeOssRepos("snapshots"), // @Todo remove when 0.14.0 released