diff --git a/src/async_impl/client.rs b/src/async_impl/client.rs
index 16204f7..9d1d57c 100644
--- a/src/async_impl/client.rs
+++ b/src/async_impl/client.rs
@@ -133,7 +133,6 @@ impl ClientBuilder {
 
         let hyper_client = ::hyper::Client::configure()
             .connector(connector)
-            .no_proto()
             .build(handle);
 
         Ok(Client {