diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 6a10301e5..f74879add 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -2,6 +2,9 @@ name: build
 
 on: [push, pull_request]
 
+permissions:
+  contents: read
+
 jobs:
   macos_build: