diff --git a/.github/workflows/dep_build_v2.yml b/.github/workflows/dep_build_v2.yml
index 305e59b9..7ea0b970 100644
--- a/.github/workflows/dep_build_v2.yml
+++ b/.github/workflows/dep_build_v2.yml
@@ -16,7 +16,7 @@ jobs:
       matrix:
         java_version: ['8', '17', '21', '24']
         # Versions need to align with ones in 'main.yml' workflow
-        kotlin_version: ['2.0.21', '2.1.20', '2.2.0-RC']
+        kotlin_version: ['2.0.21', '2.1.21', '2.2.0-RC2']
     env:
       JAVA_OPTS: "-XX:+TieredCompilation -XX:TieredStopAtLevel=1"
     steps:
diff --git a/.github/workflows/dep_build_v3.yml b/.github/workflows/dep_build_v3.yml
index 9ed25959..84466fa9 100644
--- a/.github/workflows/dep_build_v3.yml
+++ b/.github/workflows/dep_build_v3.yml
@@ -14,7 +14,7 @@ jobs:
       matrix:
         java_version: ['17', '21', '24']
         # Versions need to align with ones in 'main.yml' workflow
-        kotlin_version: ['2.0.21', '2.1.20', '2.2.0-RC']
+        kotlin_version: ['2.0.21', '2.1.21', '2.2.0-RC2']
     env:
       JAVA_OPTS: "-XX:+TieredCompilation -XX:TieredStopAtLevel=1"
     steps:
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index b48ecced..8b8223a5 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -21,7 +21,7 @@ jobs:
       max-parallel: 5
       matrix:
         java_version: ['8', '11', '17', '21', '24']
-        kotlin_version: ['2.0.21', '2.1.20', '2.2.0-RC']
+        kotlin_version: ['2.0.21', '2.1.21', '2.2.0-RC2']
         include:
           - java_version: '8'
             kotlin_version: '2.0.21'