diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 985ef7d..fb27445 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -5,6 +5,9 @@ on:
     branches:
       - '**'
 
+permissions:
+  contents: read
+
 jobs:
   test:
     runs-on: ubuntu-latest