diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 929840e..c798ad8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -3,6 +3,9 @@ name: Build check
 on:
   pull_request:
 
+permissions:
+  contents: read
+
 jobs:
   build:
     name: Build site