diff --git a/agbenchmark/agent_interface.py b/agbenchmark/agent_interface.py
index 6b2d5bbe..d93fe12e 100644
--- a/agbenchmark/agent_interface.py
+++ b/agbenchmark/agent_interface.py
@@ -6,6 +6,7 @@ import sys
 import time
 from typing import Any, Dict
 
+import psutil
 from dotenv import load_dotenv
 
 from agbenchmark.start_benchmark import CURRENT_DIRECTORY, HOME_DIRECTORY
@@ -67,7 +68,11 @@ def run_agent(
 
     if time.time() - start_time > timeout:
         print("The Python function has exceeded the time limit and was terminated.")
-        process.kill()
+        parent = psutil.Process(process.pid)
+        for child in parent.children(recursive=True):
+            child.kill()
+        parent.kill()
+
     else:
         print("The Python function has finished running.")