diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index f92e52b..5c6c2f1 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -5,6 +5,9 @@ on:
   push:
     branches: [main]
 
+permissions:
+  contents: read
+
 jobs:
   test:
     runs-on: ${{ matrix.os }}