diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index ef1b23d01b..93cde7b55a 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -2,6 +2,9 @@ name: Build
 
 on: [push, pull_request]
 
+permissions:
+  contents: read #  to fetch code (actions/checkout)
+
 jobs:
   build:
     name: "Build on JDK ${{ matrix.java }}"