diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index f8537d0c5e..6edcbcfd18 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -32,7 +32,7 @@ jobs:
         uses: actions/checkout@v2
         with:
           repository: 'opensearch-project/OpenSearch'
-          ref: '1.0'
+          ref: '1.0.0'
           path: OpenSearch
       - name: Build OpenSearch
         working-directory: ./OpenSearch