diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 02e854f..fb5427d 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -2,6 +2,9 @@ name: poetry ci
 
 on: pull_request
 
+permissions:
+  contents: read
+
 jobs:
   build:
     strategy: