diff --git a/bot.py b/bot.py
index ea9aebf..3b85cc8 100644
--- a/bot.py
+++ b/bot.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 """
-PolyBot v13 — Recalibrated + Safety Systems
+PolyBot v14 — CLOBv2 + Safety Systems
 
 Strategy:
   - Brownian motion model with vol=0.12 (recalibrated from 0.08)
@@ -164,7 +164,7 @@ def start(self):
         mp = self.strategy_config.min_prob
         me = self.strategy_config.min_edge
         print("=" * 55)
-        print(f"  PolyBot v13 — Recalibrated (vol=0.12)")
+        print(f"  PolyBot v14 — CLOBv2 (vol=0.12)")
         print(f"  Mode: {'DRY RUN' if self.dry_run else '🔴 LIVE TRADING'}")
         print(f"  Kelly: {kf*100:.0f}% fraction | "
               f"Bets: ${self.strategy_config.min_bet:.0f}–${self.strategy_config.max_bet:.0f}")
@@ -1097,6 +1097,7 @@ def _handle_shutdown(self, signum, frame):
         self.price_feed.stop()
         if self.executor._initialized:
             self.executor.cancel_all()
+            self.executor.shutdown()
 
         # Final real balance sync
         if not self.dry_run and self.executor._initialized:
diff --git a/executor.py b/executor.py
index 10cb9d3..a015f80 100644
--- a/executor.py
+++ b/executor.py
@@ -12,19 +12,22 @@
 the bot detects them via balance sync at the next window boundary.
 """
 
+import os
+import threading
 import time
 from dataclasses import dataclass
 from typing import Optional
 
-from py_clob_client.client import ClobClient
-from py_clob_client.clob_types import (
+from py_clob_client_v2.client import ClobClient
+from py_clob_client_v2.clob_types import (
     OrderArgs,
     MarketOrderArgs,
     OrderType,
     BalanceAllowanceParams,
     AssetType,
+    OrderPayload,
 )
-from py_clob_client.constants import POLYGON
+from py_clob_client_v2.constants import POLYGON
 
 
 FILLED = "FILLED"
@@ -82,33 +85,58 @@ def __init__(self, private_key: str, safe_address: str = "", dry_run: bool = Tru
         self.safe_address = safe_address
         self.client: Optional[ClobClient] = None
         self._initialized = False
+        self._heartbeat_stop = threading.Event()
+        self._heartbeat_thread: Optional[threading.Thread] = None
 
     def initialize(self) -> bool:
         try:
+            host = os.getenv("CLOB_HOST", "https://clob.polymarket.com")
             self.client = ClobClient(
-                host="https://clob.polymarket.com",
+                host=host,
                 key=self.private_key,
                 chain_id=POLYGON,
                 funder=self.safe_address if self.safe_address else None,
                 signature_type=2 if self.safe_address else 0,
             )
-            self.client.set_api_creds(self.client.create_or_derive_api_creds())
+            self.client.set_api_creds(self.client.create_or_derive_api_key())
             self._initialized = True
             print(f"[executor] Initialized ({'DRY RUN' if self.dry_run else 'LIVE'})")
             print(f"[executor] Max buy price: ${MAX_BUY_PRICE:.2f}")
             print(f"[executor] Address: {self.client.get_address()}")
+            if not self.dry_run:
+                self._start_heartbeat()
             return True
         except Exception as e:
             print(f"[executor] Init failed: {e}")
             return False
 
+    def _start_heartbeat(self):
+        """Send heartbeat every 8s — CLOB v2 cancels GTC orders after 10s without one."""
+        def _run():
+            while not self._heartbeat_stop.is_set():
+                try:
+                    self.client.post_heartbeat()
+                except Exception as e:
+                    print(f"[executor] Heartbeat failed: {e}")
+                self._heartbeat_stop.wait(8)
+        self._heartbeat_thread = threading.Thread(target=_run, daemon=True)
+        self._heartbeat_thread.start()
+        print("[executor] Heartbeat started (8s interval)")
+
+    def shutdown(self):
+        """Stop heartbeat thread cleanly."""
+        self._heartbeat_stop.set()
+        if self._heartbeat_thread:
+            self._heartbeat_thread.join(timeout=5)
+
     def get_balance(self) -> float:
         if not self._initialized:
             return 0.0
         try:
             params = BalanceAllowanceParams(asset_type=AssetType.COLLATERAL)
             bal = self.client.get_balance_allowance(params)
-            return float(bal.get("balance", 0)) / 1e6
+            balance_raw = bal.get("balance") or bal.get("pUSD") or 0
+            return float(balance_raw) / 1e6
         except Exception as e:
             print(f"[executor] Balance check failed: {e}")
             return 0.0
@@ -228,7 +256,7 @@ def buy(self, token_id: str, amount_usd: float, price: float = 0.0) -> OrderResu
             signed_order = self.client.create_order(order_args)
             result = self.client.post_order(signed_order, OrderType.GTC)
 
-            order_id = result.get("orderID", "")
+            order_id = result.get("orderID") or result.get("transactionID", "")
             if not order_id:
                 return OrderResult(
                     success=False, status=REJECTED,
@@ -388,7 +416,7 @@ def sell(self, token_id: str, shares: float, price: float = 0.0) -> OrderResult:
 
             signed_order = self.client.create_market_order(order_args)
             result = self.client.post_order(signed_order, OrderType.GTC)
-            order_id = result.get("orderID", "")
+            order_id = result.get("orderID") or result.get("transactionID", "")
 
             # Wait for settlement
             time.sleep(2)
@@ -489,7 +517,7 @@ def cancel_order(self, order_id: str) -> bool:
         if self.dry_run or not self._initialized:
             return True
         try:
-            self.client.cancel(order_id=order_id)
+            self.client.cancel_order(OrderPayload(orderID=order_id))
             return True
         except Exception as e:
             print(f"[executor] Cancel failed: {e}")
diff --git a/requirements.txt b/requirements.txt
index b93110c..e5d58e1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-py-clob-client>=0.34.5
+py-clob-client-v2>=1.0.0
 python-dotenv>=1.0.0
 websockets>=12.0
 aiohttp>=3.9.0