diff --git a/src/handler.rs b/src/handler.rs
index ea6855c7f..d6eb93bda 100644
--- a/src/handler.rs
+++ b/src/handler.rs
@@ -3,9 +3,8 @@ use std::future::Future;
 use actix_service::{boxed, fn_service};
 
 use crate::{
-    body::MessageBody,
     service::{BoxedHttpServiceFactory, ServiceRequest, ServiceResponse},
-    BoxError, FromRequest, HttpResponse, Responder,
+    FromRequest, HttpResponse, Responder,
 };
 
 /// The interface for request handlers.
@@ -92,8 +91,6 @@ where
     Args: FromRequest,
     R: Future,
     R::Output: Responder,
-    <R::Output as Responder>::Body: MessageBody,
-    <<R::Output as Responder>::Body as MessageBody>::Error: Into<BoxError>,
 {
     boxed::factory(fn_service(move |req: ServiceRequest| {
         let handler = handler.clone();
diff --git a/src/resource.rs b/src/resource.rs
index f0c6f6d7c..68866b7df 100644
--- a/src/resource.rs
+++ b/src/resource.rs
@@ -20,7 +20,7 @@ use crate::{
         BoxedHttpService, BoxedHttpServiceFactory, HttpServiceFactory, ServiceRequest,
         ServiceResponse,
     },
-    BoxError, Error, FromRequest, HttpResponse, Responder,
+    Error, FromRequest, HttpResponse, Responder,
 };
 
 /// A collection of [`Route`]s that respond to the same path pattern.
@@ -236,8 +236,6 @@ where
         Args: FromRequest + 'static,
         R: Future + 'static,
         R::Output: Responder + 'static,
-        <R::Output as Responder>::Body: MessageBody,
-        <<R::Output as Responder>::Body as MessageBody>::Error: Into<BoxError>,
     {
         self.routes.push(Route::new().to(handler));
         self
diff --git a/src/route.rs b/src/route.rs
index 6396c4286..5da4731b6 100644
--- a/src/route.rs
+++ b/src/route.rs
@@ -8,11 +8,10 @@ use actix_service::{
 use futures_core::future::LocalBoxFuture;
 
 use crate::{
-    body::MessageBody,
     guard::{self, Guard},
     handler::{handler_service, Handler},
     service::{BoxedHttpServiceFactory, ServiceRequest, ServiceResponse},
-    BoxError, Error, FromRequest, HttpResponse, Responder,
+    Error, FromRequest, HttpResponse, Responder,
 };
 
 /// A request handler with [guards](guard).
@@ -182,8 +181,6 @@ impl Route {
         Args: FromRequest + 'static,
         R: Future + 'static,
         R::Output: Responder + 'static,
-        <R::Output as Responder>::Body: MessageBody,
-        <<R::Output as Responder>::Body as MessageBody>::Error: Into<BoxError>,
     {
         self.service = handler_service(handler);
         self
diff --git a/src/web.rs b/src/web.rs
index 46e7704b6..7a0070aa3 100644
--- a/src/web.rs
+++ b/src/web.rs
@@ -1,14 +1,14 @@
 //! Essentials helper functions and types for application registration.
 
-use std::{error::Error as StdError, future::Future};
+use std::future::Future;
 
 use actix_http::Method;
 use actix_router::IntoPatterns;
 pub use bytes::{Buf, BufMut, Bytes, BytesMut};
 
 use crate::{
-    body::MessageBody, error::BlockingError, extract::FromRequest, handler::Handler,
-    resource::Resource, route::Route, scope::Scope, service::WebService, Responder,
+    error::BlockingError, extract::FromRequest, handler::Handler, resource::Resource,
+    route::Route, scope::Scope, service::WebService, Responder,
 };
 
 pub use crate::config::ServiceConfig;
@@ -152,8 +152,6 @@ where
     Args: FromRequest + 'static,
     R: Future + 'static,
     R::Output: Responder + 'static,
-    <R::Output as Responder>::Body: MessageBody + 'static,
-    <<R::Output as Responder>::Body as MessageBody>::Error: Into<Box<dyn StdError + 'static>>,
 {
     Route::new().to(handler)
 }