diff --git a/.github/workflows/run-unittest.yml b/.github/workflows/run-unittest.yml
index 62500e2..d97607a 100644
--- a/.github/workflows/run-unittest.yml
+++ b/.github/workflows/run-unittest.yml
@@ -1,5 +1,7 @@
 name: CBI unittest
 
+permissions: read-all
+
 on:
   push:
     branches: [ "main" ]