diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ad82a80..7cf9440 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -6,6 +6,9 @@ on:
   push:
     branches: ["main"]
 
+permissions:
+  contents: read
+
 jobs:
   ci:
     runs-on: ubuntu-latest