diff --git a/pac.txt b/pac.txt
index dc0699f..15b85e6 100644
--- a/pac.txt
+++ b/pac.txt
@@ -6899,7 +6899,8 @@ var rules = [
   "rebrickable.com",
   "nhentai.xxx",
   ".openai.com",
-  ".mixpanel.com"
+  ".mixpanel.com",
+  ".codesandbox.io"
 ];
 
 /*