diff --git a/.github/workflows/test_different_operating_systems.yml b/.github/workflows/test_different_operating_systems.yml
index 9462897f8..aff177ac2 100644
--- a/.github/workflows/test_different_operating_systems.yml
+++ b/.github/workflows/test_different_operating_systems.yml
@@ -1,3 +1,5 @@
+permissions:
+  contents: read
 name: Tests to run on different Operating Systems
 
 on: