1 files changed, 1 insertions, 1 deletions
diff --git a/packages/0x.js/src/utils/promisify.ts b/packages/0x.js/src/utils/promisify.ts
index 8021a3c9f..1eb1bf29f 100644
--- a/packages/0x.js/src/utils/promisify.ts
+++ b/packages/0x.js/src/utils/promisify.ts
@@ -12,7 +12,7 @@ export function promisify<T>(
     ) => void,
     target: any,
 ): (...callArgs: any[]) => Promise<T> {
-    const promisifiedFunction = (...callArgs: any[]): Promise<T> => {
+    const promisifiedFunction = async (...callArgs: any[]): Promise<T> => {
         return new Promise<T>((resolve, reject) => {
             const callback = (err: Error|null, data?: T) => {
                 _.isNull(err) ? resolve(data) : reject(err);