diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a890218da..85dd6a8d4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,6 +8,9 @@ on:
     branches:
       - master
 
+permissions:
+  contents: read
+
 jobs:
   build:
     runs-on: ubuntu-latest