diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 189cc41..3d9e535 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -10,6 +10,9 @@ on:
   schedule:
     - cron: "0 0 * * *"
 
+permissions:
+  contents: read
+
 jobs:
   test:
     name: ${{ matrix.os }}