diff --git a/.github/workflows/pull-request-build.yml b/.github/workflows/pull-request-build.yml
index 87d2eaf..3b5d235 100644
--- a/.github/workflows/pull-request-build.yml
+++ b/.github/workflows/pull-request-build.yml
@@ -4,6 +4,9 @@ on:
   pull_request:
     branches: [ master ]
 
+permissions:
+  contents: read
+
 jobs:
   build:
     runs-on: ubuntu-latest