diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 544a6c4..82e5242 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -6,6 +6,8 @@ on:
   pull_request:
     branches: [ main ]
 
+permissions: read-all
+
 jobs:
 
   build: