diff --git a/src/types.ts b/src/types.ts
index 71227647bd..2ccf573a9a 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -385,3 +385,7 @@ export interface JSONRPCPayload {
     params: any[];
     method: string;
 }
+
+export interface ZeroExConfig {
+    gasPrice?: BigNumber.BigNumber;
+}