diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 959605d4c..c8ae4f20f 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -2,6 +2,8 @@ name: CI
 on:
   - push
   - pull_request
+permissions:
+  contents: read
 jobs:
   test:
     name: Node.js ${{ matrix.node-version }} on ${{ matrix.os }}