diff --git a/backend/infra/coderunner/impl/script/sandbox.py b/backend/infra/coderunner/impl/script/sandbox.py
index 28ee898bd1..d61ebc01f7 100644
--- a/backend/infra/coderunner/impl/script/sandbox.py
+++ b/backend/infra/coderunner/impl/script/sandbox.py
@@ -165,6 +165,9 @@ def execute(
 import json
 import sys
 import asyncio
+null = None
+true = True
+false = False
 class Args:
     def __init__(self, params):
         self.params = params