diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 78a15cfb..46128ded 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -13,6 +13,9 @@ on:
       - "flask_openapi/**"
       - "tests/**"
 
+permissions:
+  contents: read
+
 jobs:
   tests:
     runs-on: ubuntu-latest