1 files changed, 1 insertions, 1 deletions
diff --git a/packages/0x.js/src/order_watcher/order_state_watcher.ts b/packages/0x.js/src/order_watcher/order_state_watcher.ts
index a9df8ac9d..008db6bc4 100644
--- a/packages/0x.js/src/order_watcher/order_state_watcher.ts
+++ b/packages/0x.js/src/order_watcher/order_state_watcher.ts
@@ -1,4 +1,5 @@
 import { schemas } from '@0xproject/json-schemas';
+import { assert } from '@0xproject/order-utils';
 import { BlockParamLiteral, LogWithDecodedArgs, SignedOrder } from '@0xproject/types';
 import { AbiDecoder, intervalUtils } from '@0xproject/utils';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
@@ -33,7 +34,6 @@ import {
     OrderStateWatcherConfig,
     ZeroExError,
 } from '../types';
-import { assert } from '../utils/assert';
 import { OrderStateUtils } from '../utils/order_state_utils';
 import { utils } from '../utils/utils';