diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index ea65e9150..0ad023cce 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -50,4 +50,4 @@ jobs:
         run: docker compose -f docker-compose.yml run test_runner vendor/bin/phpunit --no-progress --testsuite Structure
 
       - name: run cs fixer
-        run: docker compose -f docker-compose.yml run test_runner composer cs -- --show-progress=none
+        run: docker compose -f docker-compose.yml run -e PHP_VERSION=7.4 test_runner composer cs -- --show-progress=none