diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 40ff50b..5258100 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -3,6 +3,9 @@ on:
   pull_request:
     branches: [main]
 
+permissions:
+  contents: read
+
 jobs:
   ci:
     # No Python source in this repo — ruff no-ops on an empty file set and the