diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b42a6b7..d14f502 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -5,6 +5,9 @@ on:
   pull_request:
     branches: ["master"]
 
+permissions:
+  contents: read
+
 jobs:
   build:
     runs-on: ubuntu-latest