diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 4d87cb58d..27588005a 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -11,6 +11,9 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+permissions:
+  contents: read
+
 jobs:
 
   rustfmt: