diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 07e7b97..d7238da 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -6,6 +6,9 @@ on:
   pull_request:
     branches: [ master ]
 
+permissions:
+  contents: read
+
 jobs:
   test:
     name: Test