diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 315bb318..9822ea7b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -7,6 +7,8 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+permissions: read-all
+
 jobs:
   package-source-tgz:
     secrets: inherit