diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index da0f64998..ae7f8c9cc 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -16,6 +16,9 @@ on:
       - master
   pull_request:
 
+permissions:
+  contents: read
+
 jobs:
   benchmark:
     env: