diff --git a/tools/code_execution_tool.py b/tools/code_execution_tool.py
index 8c103e2f1..63ac7dec2 100644
--- a/tools/code_execution_tool.py
+++ b/tools/code_execution_tool.py
@@ -511,6 +511,7 @@ def execute_code(
         duration = round(time.monotonic() - exec_start, 2)
 
         # Wait for RPC thread to finish
+        server_sock.close()  # break accept() so thread exits promptly
         rpc_thread.join(timeout=3)
 
         # Build response