diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 78cf846..f197b87 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,6 +10,9 @@ on:
     branches:
     - main
 
+permissions:
+  contents: read
+
 jobs:
   build-and-test-linux:
     runs-on: ubuntu-latest