diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 47b2b2f5e..783b5052d 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -1,6 +1,9 @@
 name: CI
 on: [push, pull_request]
 
+permissions:
+  contents: read #  to fetch code (actions/checkout)
+
 jobs:
   test:
     name: Test