diff --git a/.github/workflows/test-integration-unreleased.yml b/.github/workflows/test-integration-unreleased.yml
index 04132d1a..65be39b9 100644
--- a/.github/workflows/test-integration-unreleased.yml
+++ b/.github/workflows/test-integration-unreleased.yml
@@ -11,7 +11,7 @@ jobs:
         entry:
           - { branch: '1.x', java-version: '11' }
           - { branch: '2.x', java-version: '17' }
-          - { branch: 'main', java-version: '17' }
+          - { branch: 'main', java-version: '21' }
     steps:
       - name: Checkout OpenSearch
         uses: actions/checkout@v4