diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 74a1388a..49e823ce 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,6 +8,9 @@ on:
     branches:
       - 'main'
 
+permissions:
+  contents: read
+
 jobs:
   windows-build-and-run:
     name: Run Tests on Windows