diff --git a/.github/workflows/unit_tests.yml b/.github/workflows/unit_tests.yml
index a1cca03b..9f41d595 100644
--- a/.github/workflows/unit_tests.yml
+++ b/.github/workflows/unit_tests.yml
@@ -6,6 +6,9 @@ on:
   pull_request:
     branches: [main]
 
+permissions:
+  contents: read
+
 jobs:
   test:
     runs-on: depot-ubuntu-22.04