diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9c0811b..c4308f8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -4,6 +4,9 @@ on:
   push:
   pull_request:
 
+permissions:
+  contents: read
+
 jobs:
   test:
     strategy: