diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index b65217a..78f5cb0 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -6,6 +6,9 @@ on:
   pull_request:
     branches: [ master ]
 
+permissions:
+  contents: read
+
 jobs:
   build:
     runs-on: ubuntu-latest