diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 67f5028cd..9431863b7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,5 +1,7 @@
 name: CI
 on: [push, pull_request]
+permissions:
+  contents: read # to fetch code (actions/checkout)
 jobs:
   build:
     runs-on: ubuntu-latest