diff --git a/types/pg/index.d.ts b/types/pg/index.d.ts
index 6a2bd068d5..2b442b1227 100644
--- a/types/pg/index.d.ts
+++ b/types/pg/index.d.ts
@@ -42,6 +42,7 @@ export interface PoolConfig extends ClientConfig {
       reapIntervalMillis?: number;
       returnToHead?: boolean;
       application_name?: string;
+      Promise?: PromiseConstructorLike;
 }
 
 export interface QueryConfig {
@@ -71,7 +72,7 @@ export declare class Pool extends events.EventEmitter {
     connect(callback: (err: Error, client: Client, done: () => void) => void): void;
 
     end(): Promise<void>;
-    
+
     query(queryStream: QueryConfig & stream.Readable): stream.Readable;
     query(queryTextOrConfig: string | QueryConfig): Promise<QueryResult>;
     query(queryText: string, values: any[]): Promise<QueryResult>;
diff --git a/types/pg/pg-tests.ts b/types/pg/pg-tests.ts
index bdf49ab240..2fe301935a 100644
--- a/types/pg/pg-tests.ts
+++ b/types/pg/pg-tests.ts
@@ -1,5 +1,6 @@
 
 import * as pg from "pg";
+import * as bluebird from "bluebird";
 
 var conString = "postgres://username:password@localhost/database";
 
@@ -54,6 +55,7 @@ var config = {
   port: 5432, //env var: PGPORT
   max: 10, // max number of clients in the pool
   idleTimeoutMillis: 30000, // how long a client is allowed to remain idle before being closed
+  Promise: bluebird
 };
 var pool = new pg.Pool(config);