diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index e995f4c..0324b3a 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -3,6 +3,9 @@ name: Tests
 
 on: [push, pull_request]
 
+permissions:
+  contents: read
+
 jobs:
   test:
     runs-on: ubuntu-latest