diff --git a/types/express-http-proxy/express-http-proxy-tests.ts b/types/express-http-proxy/express-http-proxy-tests.ts
index 61eb11a056..0f2f69d025 100644
--- a/types/express-http-proxy/express-http-proxy-tests.ts
+++ b/types/express-http-proxy/express-http-proxy-tests.ts
@@ -11,6 +11,10 @@ proxy("www.google.com", {
     proxyReqPathResolver: req => req.url
 });
 
+proxy("www.google.com", {
+    proxyReqPathResolver: async req => req.url
+});
+
 proxy("www.google.com", {
     limit: "10mb"
 });
diff --git a/types/express-http-proxy/index.d.ts b/types/express-http-proxy/index.d.ts
index 651619197b..201f1334dd 100644
--- a/types/express-http-proxy/index.d.ts
+++ b/types/express-http-proxy/index.d.ts
@@ -1,4 +1,4 @@
-// Type definitions for express-http-proxy 1.5
+// Type definitions for express-http-proxy 1.6
 // Project: https://github.com/villadora/express-http-proxy#readme
 // Definitions by:  ulrichb <https://github.com/ulrichb>
 //                  Daniel Schopf <https://github.com/Danscho>
@@ -25,7 +25,7 @@ declare namespace proxy {
             res: Response,
             next: NextFunction
         ) => any;
-        proxyReqPathResolver?: (req: Request) => string;
+        proxyReqPathResolver?: (req: Request) => string | Promise<string>;
         proxyReqOptDecorator?: (
             proxyReqOpts: RequestOptions,
             srcReq: Request