diff --git a/.github/workflows/pull-request.yml b/.github/workflows/pull-request.yml
index e02aa89..d450795 100644
--- a/.github/workflows/pull-request.yml
+++ b/.github/workflows/pull-request.yml
@@ -171,7 +171,7 @@ jobs:
           PATH="$PWD/sonar-scanner/bin:$PATH"
           if [[ "${{ github.event_name }}" == "pull_request" ]]; then
             git checkout "${GITHUB_HEAD_REF}"
-            sonar-scanner -Dsonar.pullrequest.branch="{{ github.event.pull_request.head.sha }}" -Dsonar.pullrequest.base="{{ github.event.pull_request.base.sha }}" -Dsonar.pullrequest.key="${{ github.event.number }}"
+            sonar-scanner -Dsonar.pullrequest.branch="${GITHUB_HEAD_REF}" -Dsonar.pullrequest.base="${GITHUB_BASE_REF}" -Dsonar.pullrequest.key="${{ github.event.number }}"
           else
             sonar-scanner
           fi