diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a5fc81f1..abd85685 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -3,6 +3,8 @@ on:
   pull_request:
   push:
     branches: [ main ]
+permissions:
+  contents: read
 jobs:
   test:
     runs-on: ${{ matrix.os }}