diff --git a/.github/workflows/nightly.yml b/.github/workflows/nightly.yml
index 2897d641f..b7664a12f 100644
--- a/.github/workflows/nightly.yml
+++ b/.github/workflows/nightly.yml
@@ -5,6 +5,9 @@ on:
 #    # 08:00 UTC = 03:00 EST
 #    - cron:  '0 8 * * *'
 
+permissions:
+  contents: read # to fetch code (actions/checkout)
+
 jobs:
   deploy:
     strategy: