diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b0f14ca3..c9f6d67b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -4,6 +4,9 @@ on:
     branches: master
   pull_request:
 
+permissions:
+  contents: read #  to fetch code (actions/checkout)
+
 jobs:
   test:
     strategy: