diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7df451a1..7f11286b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -7,6 +7,9 @@ on:
     branches:
       - master
 
+permissions:
+  contents: read
+
 jobs:
   build: