diff --git a/.github/workflows/ci-tests.yml b/.github/workflows/ci-tests.yml
index f9492f4f..4133613c 100644
--- a/.github/workflows/ci-tests.yml
+++ b/.github/workflows/ci-tests.yml
@@ -6,6 +6,10 @@ name: mixer-tools CI
 
 on: [push, pull_request]
 
+permissions:
+  contents: read
+  pull-requests: read
+
 jobs:
   pre-check:
     runs-on: ubuntu-latest