diff --git a/.circleci/config.yml b/.circleci/config.yml
index 9fbe99b..b9453ad 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -52,7 +52,7 @@ jobs:
       - image: cimg/openjdk:21.0
     steps:
       - build_and_test:
-          kotlin: 2.0.0
+          kotlin: 2.0.20
 
 workflows:
   bld:
diff --git a/.github/workflows/bld.yml b/.github/workflows/bld.yml
index 55e101f..3f7786d 100644
--- a/.github/workflows/bld.yml
+++ b/.github/workflows/bld.yml
@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         java-version: [ 17, 21, 22 ]
-        kotlin-version: [ 1.19.24, 2.0.0 ]
+        kotlin-version: [ 1.19.24, 2.0.20 ]
 
     steps:
       - name: Checkout source repository