diff --git a/.github/workflows/ci-cd.yml b/.github/workflows/ci-cd.yml
index 29791f1e..b3017487 100644
--- a/.github/workflows/ci-cd.yml
+++ b/.github/workflows/ci-cd.yml
@@ -22,7 +22,7 @@ jobs:
       - name: Validate release tag
         run: |
           git fetch origin master --no-tags
-          git merge-base --is-ancestor "$GITHUB_SHA" origin/master
+          git merge-base --is-ancestor "$GITHUB_SHA" FETCH_HEAD
           VERSION_CODE=$(sed -nE 's/^def appVersionCode = ([0-9]+)$/\1/p' app/build.gradle)
           VERSION_TEMPLATE=$(sed -nE 's/^def appVersionName = "([^"]+)"$/\1/p' app/build.gradle)
           VERSION=${VERSION_TEMPLATE//\$\{appVersionCode\}/$VERSION_CODE}