diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8788b12..4b36dd4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -17,7 +17,7 @@ on:
   workflow_call:
     inputs:
       java-version:
-        default: '17'
+        default: '21'
         description: JDK version
         required: false
         type: string
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index ef041f6..e543972 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -9,7 +9,7 @@ on:
   workflow_call:
     inputs:
       java-version:
-        default: '17'
+        default: '21'
         description: JDK version
         required: false
         type: string