diff --git a/src/body/incoming.rs b/src/body/incoming.rs
index ad5bd16116..76f5cc28db 100644
--- a/src/body/incoming.rs
+++ b/src/body/incoming.rs
@@ -6,6 +6,7 @@ use std::task::{Context, Poll};
 use bytes::Bytes;
 use futures_channel::mpsc;
 use futures_channel::oneshot;
+use futures_util::ready;
 use futures_util::{stream::FusedStream, Stream}; // for mpsc::Receiver
 use http::HeaderMap;
 use http_body::{Body, Frame, SizeHint};
diff --git a/src/client/conn/http1.rs b/src/client/conn/http1.rs
index c487b1927a..f9f9e77b98 100644
--- a/src/client/conn/http1.rs
+++ b/src/client/conn/http1.rs
@@ -8,6 +8,7 @@ use std::task::{Context, Poll};
 
 use crate::rt::{Read, Write};
 use bytes::Bytes;
+use futures_util::ready;
 use http::{Request, Response};
 use httparse::ParserConfig;
 
diff --git a/src/client/conn/http2.rs b/src/client/conn/http2.rs
index ec8ecf3e08..dec10eabaa 100644
--- a/src/client/conn/http2.rs
+++ b/src/client/conn/http2.rs
@@ -10,6 +10,7 @@ use std::task::{Context, Poll};
 use std::time::Duration;
 
 use crate::rt::{Read, Write};
+use futures_util::ready;
 use http::{Request, Response};
 
 use super::super::dispatch;
diff --git a/src/common/mod.rs b/src/common/mod.rs
index 4129673cdc..a89753a8c4 100644
--- a/src/common/mod.rs
+++ b/src/common/mod.rs
@@ -1,12 +1,3 @@
-macro_rules! ready {
-    ($e:expr) => {
-        match $e {
-            std::task::Poll::Ready(v) => v,
-            std::task::Poll::Pending => return std::task::Poll::Pending,
-        }
-    };
-}
-
 #[cfg(all(any(feature = "client", feature = "server"), feature = "http1"))]
 pub(crate) mod buf;
 #[cfg(all(feature = "server", any(feature = "http1", feature = "http2")))]
diff --git a/src/lib.rs b/src/lib.rs
index 0d1db8320a..2648c0ebeb 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -84,9 +84,8 @@ mod cfg;
 #[macro_use]
 mod trace;
 
-#[macro_use]
-mod common;
 pub mod body;
+mod common;
 mod error;
 pub mod ext;
 #[cfg(test)]
diff --git a/src/proto/h1/conn.rs b/src/proto/h1/conn.rs
index 43fba3b793..0a73883ad3 100644
--- a/src/proto/h1/conn.rs
+++ b/src/proto/h1/conn.rs
@@ -8,6 +8,7 @@ use std::time::Duration;
 
 use crate::rt::{Read, Write};
 use bytes::{Buf, Bytes};
+use futures_util::ready;
 use http::header::{HeaderValue, CONNECTION};
 use http::{HeaderMap, Method, Version};
 use httparse::ParserConfig;
diff --git a/src/proto/h1/decode.rs b/src/proto/h1/decode.rs
index 9c7b4b39d1..74d8f70af1 100644
--- a/src/proto/h1/decode.rs
+++ b/src/proto/h1/decode.rs
@@ -5,6 +5,7 @@ use std::task::{Context, Poll};
 use std::usize;
 
 use bytes::Bytes;
+use futures_util::ready;
 
 use super::io::MemRead;
 use super::DecodedLength;
diff --git a/src/proto/h1/dispatch.rs b/src/proto/h1/dispatch.rs
index 7190959cd7..c55c28c906 100644
--- a/src/proto/h1/dispatch.rs
+++ b/src/proto/h1/dispatch.rs
@@ -8,6 +8,7 @@ use std::{
 
 use crate::rt::{Read, Write};
 use bytes::{Buf, Bytes};
+use futures_util::ready;
 use http::Request;
 
 use super::{Http1Transaction, Wants};
diff --git a/src/proto/h1/io.rs b/src/proto/h1/io.rs
index 3827e4ed15..417119ef11 100644
--- a/src/proto/h1/io.rs
+++ b/src/proto/h1/io.rs
@@ -10,6 +10,7 @@ use std::task::{Context, Poll};
 
 use crate::rt::{Read, ReadBuf, Write};
 use bytes::{Buf, BufMut, Bytes, BytesMut};
+use futures_util::ready;
 
 use super::{Http1Transaction, ParseContext, ParsedMessage};
 use crate::common::buf::BufList;
diff --git a/src/proto/h2/client.rs b/src/proto/h2/client.rs
index f25ce1a4e0..97311f6147 100644
--- a/src/proto/h2/client.rs
+++ b/src/proto/h2/client.rs
@@ -12,6 +12,7 @@ use bytes::Bytes;
 use futures_channel::mpsc::{Receiver, Sender};
 use futures_channel::{mpsc, oneshot};
 use futures_util::future::{Either, FusedFuture, FutureExt as _};
+use futures_util::ready;
 use futures_util::stream::{StreamExt as _, StreamFuture};
 use h2::client::{Builder, Connection, SendRequest};
 use h2::SendStream;
diff --git a/src/proto/h2/mod.rs b/src/proto/h2/mod.rs
index 15afe48d23..b344f84cbb 100644
--- a/src/proto/h2/mod.rs
+++ b/src/proto/h2/mod.rs
@@ -6,6 +6,7 @@ use std::pin::Pin;
 use std::task::{Context, Poll};
 
 use bytes::{Buf, Bytes};
+use futures_util::ready;
 use h2::{Reason, RecvStream, SendStream};
 use http::header::{HeaderName, CONNECTION, TE, TRAILER, TRANSFER_ENCODING, UPGRADE};
 use http::HeaderMap;
diff --git a/src/proto/h2/server.rs b/src/proto/h2/server.rs
index 0337e22ea8..fa9680d9bf 100644
--- a/src/proto/h2/server.rs
+++ b/src/proto/h2/server.rs
@@ -6,6 +6,7 @@ use std::task::{Context, Poll};
 use std::time::Duration;
 
 use bytes::Bytes;
+use futures_util::ready;
 use h2::server::{Connection, Handshake, SendResponse};
 use h2::{Reason, RecvStream};
 use http::{Method, Request};
diff --git a/src/server/conn/http1.rs b/src/server/conn/http1.rs
index d4b8924e9f..24bebfd292 100644
--- a/src/server/conn/http1.rs
+++ b/src/server/conn/http1.rs
@@ -11,6 +11,7 @@ use std::time::Duration;
 
 use crate::rt::{Read, Write};
 use bytes::Bytes;
+use futures_util::ready;
 
 use crate::body::{Body, Incoming as IncomingBody};
 use crate::proto;
diff --git a/src/server/conn/http2.rs b/src/server/conn/http2.rs
index e412f0001f..df04bc473d 100644
--- a/src/server/conn/http2.rs
+++ b/src/server/conn/http2.rs
@@ -10,6 +10,7 @@ use std::task::{Context, Poll};
 use std::time::Duration;
 
 use crate::rt::{Read, Write};
+use futures_util::ready;
 use pin_project_lite::pin_project;
 
 use crate::body::{Body, Incoming as IncomingBody};