diff --git a/build.sbt b/build.sbt
index f9c8557..e92a4d3 100644
--- a/build.sbt
+++ b/build.sbt
@@ -1,4 +1,4 @@
-ThisBuild / crossScalaVersions := Seq("2.12.20", "3.3.7", "2.13.18")
+ThisBuild / crossScalaVersions := Seq("2.12.21", "3.3.7", "2.13.18")
 ThisBuild / tlBaseVersion := "2.5"
 ThisBuild / tlVersionIntroduced := Map("3" -> "2.0.2")
 ThisBuild / startYear := Some(2014)