diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 70b21d8b..a64c2e9b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -6,6 +6,9 @@ on:
   schedule:
     - cron: '0 0 * * 3'
 
+permissions:
+  contents: read #  to fetch code (actions/checkout)
+
 jobs:
   build: