diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index db83c3d9ac..a4c768e022 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -8,6 +8,9 @@ on:
     branches:
       - master
 
+permissions:
+  contents: read
+
 jobs:
   test:
     runs-on: ${{ matrix.os }}