diff --git a/.github/workflows/phpstan.yml b/.github/workflows/phpstan.yml
index 1c41411..e011290 100644
--- a/.github/workflows/phpstan.yml
+++ b/.github/workflows/phpstan.yml
@@ -11,10 +11,9 @@ concurrency:
 jobs:
   tests:
     name: PHP${{ matrix.php-version }} Static Code Analysis on Linux
-    runs-on: "${{ matrix.os }}"
+    runs-on: ubuntu-latest
     strategy:
       matrix:
-        os: [ ubuntu-latest ]
         php-version: [ '8.0', '8.1', '8.2', '8.3', '8.4' ]
       max-parallel: 5
       fail-fast: false