diff --git a/jakarta/transform.sh b/jakarta/transform.sh
index 126cbcefca478..bff09c434c331 100755
--- a/jakarta/transform.sh
+++ b/jakarta/transform.sh
@@ -62,7 +62,7 @@ if [ "${REWRITE_OFFLINE-false}" != "true" ]; then
   # Build Kotlin Maven Plugin to allow skipping main compilation
   # (skipping test compilation is supported but not main)
   rm -rf target/kotlin
-  git clone -b v1.6.20-jakarta --depth 1 https://github.com/gsmet/kotlin.git target/kotlin
+  git clone -b v1.6.21-jakarta --depth 1 https://github.com/gsmet/kotlin.git target/kotlin
   pushd target/kotlin/libraries/tools/kotlin-maven-plugin
   mvn -B clean install -DskipTests -DskipITs
   popd