2 files changed, 2 insertions, 4 deletions
diff --git a/packages/subproviders/src/globals.d.ts b/packages/subproviders/src/globals.d.ts
index 916fed807..580c5aaa5 100644
--- a/packages/subproviders/src/globals.d.ts
+++ b/packages/subproviders/src/globals.d.ts
@@ -1,5 +1,3 @@
-declare module 'es6-promisify';
-
 // tslint:disable:max-classes-per-file
 // tslint:disable:class-name
 // tslint:disable:async-suffix
diff --git a/packages/subproviders/src/subproviders/subprovider.ts b/packages/subproviders/src/subproviders/subprovider.ts
index 26ce19305..c51462f07 100644
--- a/packages/subproviders/src/subproviders/subprovider.ts
+++ b/packages/subproviders/src/subproviders/subprovider.ts
@@ -1,5 +1,5 @@
 import { JSONRPCRequestPayload, JSONRPCResponsePayload } from '@0xproject/types';
-import promisify = require('es6-promisify');
+import { promisify } from '@0xproject/utils';
 import * as Web3 from 'web3';
 
 import { JSONRPCRequestPayloadWithMethod } from '../types';
@@ -40,7 +40,7 @@ export class Subprovider {
      */
     public async emitPayloadAsync(payload: Partial<JSONRPCRequestPayloadWithMethod>): Promise<JSONRPCResponsePayload> {
         const finalPayload = Subprovider._createFinalPayload(payload);
-        const response = await promisify(this._engine.sendAsync, this._engine)(finalPayload);
+        const response = await promisify<JSONRPCResponsePayload>(this._engine.sendAsync, this._engine)(finalPayload);
         return response;
     }
     /**