diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 5a965c7..db06390 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -6,6 +6,9 @@ on:
       - main
   pull_request:
 
+permissions:
+  contents: read
+
 jobs:
   codegen-tests:
     runs-on: ubuntu-latest