diff --git a/.github/workflows/dep_build_v2.yml b/.github/workflows/dep_build_v2.yml
index 437c42e8..87730dfa 100644
--- a/.github/workflows/dep_build_v2.yml
+++ b/.github/workflows/dep_build_v2.yml
@@ -18,7 +18,7 @@ jobs:
         # Versions need to align with ones in 'main.yml' workflow
         # kotlin-reflect 1.8.2x has a bug and some tests fail, so we are downgrading to 1.8.10.
         # https://youtrack.jetbrains.com/issue/KT-65156
-        kotlin_version: ['1.8.10', '1.9.24', '2.0.21', '2.1.0-RC']
+        kotlin_version: ['1.8.10', '1.9.24', '2.0.21', '2.1.0-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 1ce03f53..07a8c1e5 100644
--- a/.github/workflows/dep_build_v3.yml
+++ b/.github/workflows/dep_build_v3.yml
@@ -18,7 +18,7 @@ jobs:
         # Versions need to align with ones in 'main.yml' workflow
         # kotlin-reflect 1.8.2x has a bug and some tests fail, so we are downgrading to 1.8.10.
         # https://youtrack.jetbrains.com/issue/KT-65156
-        kotlin_version: ['1.8.10', '1.9.24', '2.0.21', '2.1.0-RC']
+        kotlin_version: ['1.8.10', '1.9.24', '2.0.21', '2.1.0-RC2']
     env:
       JAVA_OPTS: "-XX:+TieredCompilation -XX:TieredStopAtLevel=1"
     steps:
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 0c28f430..0285131d 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -30,7 +30,7 @@ jobs:
         java_version: ['8', '11', '17', '21', '23']
         # kotlin-reflect 1.8.2x has a bug and some tests fail, so we are downgrading to 1.8.10.
         # https://youtrack.jetbrains.com/issue/KT-65156
-        kotlin_version: ['1.8.10', '1.9.24', '2.0.21', '2.1.0-RC']
+        kotlin_version: ['1.8.10', '1.9.24', '2.0.21', '2.1.0-RC2']
         include:
           - java_version: '8'
             kotlin_version: '1.8.10'