diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 79be5786cc..7b6e42ef34 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -12,6 +12,9 @@ on:
     - 'test/**'
     - 'tools/**'
 
+permissions:
+  contents: read
+
 jobs:
   build:
     runs-on: ubuntu-latest