diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b1e5bc2..5c62756 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -5,6 +5,9 @@ on:
     branches: ["master"]
   pull_request:
 
+permissions:
+  contents: read
+
 env:
   GO_VERSION: 1.24