diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index bd030281cb5..d739014dee7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -2,6 +2,9 @@
 # Most of the CI is defined in ci.jsonnet.
 name: CI
 on: [push, pull_request]
+permissions:
+  contents: read
+
 jobs:
   lint:
     name: lint