diff --git a/.github/workflows/fit_OpenSearch.yml b/.github/workflows/fit_OpenSearch.yml
index 4ff6815eee..005678a35a 100644
--- a/.github/workflows/fit_OpenSearch.yml
+++ b/.github/workflows/fit_OpenSearch.yml
@@ -36,7 +36,7 @@ jobs:
       uses: actions/setup-java@v3
       with:
         distribution: 'zulu'
-        java-version: 11
+        java-version: 21
     - name: Setup Maven
       uses: stCarolas/setup-maven@v4.5
       with: