diff --git a/.github/workflows/phpcs.yml b/.github/workflows/phpcs.yml
index 5ef88a7..b53c7e0 100644
--- a/.github/workflows/phpcs.yml
+++ b/.github/workflows/phpcs.yml
@@ -66,7 +66,7 @@ jobs:
         env:
           REVIEWDOG_GITHUB_API_TOKEN: ${{ secrets.access-token }}
         run: |
-          JSON_REPORT=$(vendor/bin/phpcs --report=json $CHANGED_FILES)
+          JSON_REPORT=$(vendor/bin/phpcs --report=json ${{ env.CHANGED_FILES }} )
           echo $JSON_REPORT | jq empty
           if [ $? -ne 0 ]; then
             echo "Invalid JSON"