diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index bc966cd2..5e4cfdff 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -27,11 +27,19 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
+        java-version:
+          - 11
+          - 21
         groovy-version:
           - 2.5.23
           - 3.0.19
           - 4.0.15
           - 5.0.0-alpha-2
+        exclude:
+          - java-version: 21
+            groovy-version: 2.5.23
+          - java-version: 21
+            groovy-version: 3.0.19
     env:
       MVN_GROOVY_GROUP_ID: ${{format('{0}{1}', '-DgroovyVersion=', matrix.groovy-version)}}
       MVN_GROOVY_VERSION: ${{(startsWith(matrix.groovy-version, '2') || startsWith(matrix.groovy-version, '3')) && '-DgroovyGroupId=org.codehaus.groovy' || '-DgroovyGroupId=org.apache.groovy' }}