diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 700fcc12e..6fd1ff8b9 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,6 +13,9 @@ on:
       - 'Doc/**'
       - 'appveyor.yml'
 
+permissions:
+  contents: read
+
 jobs:
   build: