diff --git a/.github/workflows/mac.yml b/.github/workflows/mac.yml
index d400528b..fb5740ca 100644
--- a/.github/workflows/mac.yml
+++ b/.github/workflows/mac.yml
@@ -1,5 +1,8 @@
 name: mac
 
+permissions:
+  contents: read
+
 on:
   push:
     branches: [master]