diff --git a/.github/workflows/build-test.yml b/.github/workflows/build-test.yml
index ef1c16dc9..633225e66 100644
--- a/.github/workflows/build-test.yml
+++ b/.github/workflows/build-test.yml
@@ -15,6 +15,9 @@ on:
       - genMatrix.js
       - ".github/workflows/build-test.yml"
 
+permissions:
+  contents: read
+
 jobs:
   gen-matrix:
     name: generate-matrix