diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 77c3699..d9597d7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,6 +12,9 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+permissions:
+  contents: read
+
 jobs:
   # Shared setup for dependency caching
   setup: