diff --git a/build.sbt b/build.sbt
index 7502d79..bb6beb2 100644
--- a/build.sbt
+++ b/build.sbt
@@ -46,7 +46,7 @@ lazy val types = crossProject(JSPlatform, JVMPlatform)
   .crossType(CrossType.Pure)
   .settings(commonSettings)
   .settings(
-    crossScalaVersions := Seq("2.12.20", "2.13.16", "3.3.0"),
+    crossScalaVersions := Seq("2.12.21", "2.13.16", "3.3.0"),
     name := "sloth-types",
     libraryDependencies ++=
       Deps.cats.value ::