diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index ec1fd643d..3794fda9d 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -2,6 +2,9 @@ name: build
 
 on: [push, pull_request]
 
+permissions:
+  contents: read
+
 jobs:
   test:
     name: Test on node ${{ matrix.node-version }} and ${{ matrix.os }}