diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index abf2107..4f64aa5 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -2,6 +2,9 @@ name: CI
 
 on: [push, pull_request]
 
+permissions:
+  contents: read
+
 jobs:
   ubuntu:
     strategy: