diff --git a/actix-http/Cargo.toml b/actix-http/Cargo.toml
index 0cc8e5cf9..1a4436f96 100644
--- a/actix-http/Cargo.toml
+++ b/actix-http/Cargo.toml
@@ -58,7 +58,7 @@ encoding_rs = "0.8"
 futures-channel = { version = "0.3.7", default-features = false }
 futures-core = { version = "0.3.7", default-features = false }
 futures-util = { version = "0.3.7", default-features = false, features = ["sink"] }
-fxhash = "0.2.1"
+ahash = "0.6"
 h2 = "0.3.0"
 http = "0.2.2"
 httparse = "1.3"
diff --git a/actix-http/src/client/pool.rs b/actix-http/src/client/pool.rs
index 7da2b6234..8926219b2 100644
--- a/actix-http/src/client/pool.rs
+++ b/actix-http/src/client/pool.rs
@@ -13,7 +13,7 @@ use actix_utils::task::LocalWaker;
 use bytes::Bytes;
 use futures_channel::oneshot;
 use futures_util::future::{poll_fn, FutureExt, LocalBoxFuture};
-use fxhash::FxHashMap;
+use ahash::AHashMap;
 use h2::client::{Connection, SendRequest};
 use http::uri::Authority;
 use indexmap::IndexSet;
@@ -59,7 +59,7 @@ where
             acquired: 0,
             waiters: Slab::new(),
             waiters_queue: IndexSet::new(),
-            available: FxHashMap::default(),
+            available: AHashMap::default(),
             waker: LocalWaker::new(),
         }));
 
@@ -257,7 +257,7 @@ struct AvailableConnection<Io> {
 pub(crate) struct Inner<Io> {
     config: ConnectorConfig,
     acquired: usize,
-    available: FxHashMap<Key, VecDeque<AvailableConnection<Io>>>,
+    available: AHashMap<Key, VecDeque<AvailableConnection<Io>>>,
     waiters: Slab<
         Option<(
             Connect,
diff --git a/actix-http/src/extensions.rs b/actix-http/src/extensions.rs
index b20dfe11d..e978c1749 100644
--- a/actix-http/src/extensions.rs
+++ b/actix-http/src/extensions.rs
@@ -1,14 +1,16 @@
-use std::any::{Any, TypeId};
-use std::{fmt, mem};
+use std::{
+    any::{Any, TypeId},
+    fmt, mem,
+};
 
-use fxhash::FxHashMap;
+use ahash::AHashMap;
 
 /// A type map of request extensions.
 #[derive(Default)]
 pub struct Extensions {
     /// Use FxHasher with a std HashMap with for faster
     /// lookups on the small `TypeId` (u64 equivalent) keys.
-    map: FxHashMap<TypeId, Box<dyn Any>>,
+    map: AHashMap<TypeId, Box<dyn Any>>,
 }
 
 impl Extensions {
@@ -16,7 +18,7 @@ impl Extensions {
     #[inline]
     pub fn new() -> Extensions {
         Extensions {
-            map: FxHashMap::default(),
+            map: AHashMap::default(),
         }
     }
 
diff --git a/actix-http/src/header/map.rs b/actix-http/src/header/map.rs
index 6ab3509f7..adcf579d0 100644
--- a/actix-http/src/header/map.rs
+++ b/actix-http/src/header/map.rs
@@ -1,8 +1,7 @@
-use std::collections::hash_map::{self, Entry};
-use std::convert::TryFrom;
+use std::{collections::hash_map::{self, Entry}, convert::TryFrom};
 
+use ahash::AHashMap;
 use either::Either;
-use fxhash::FxHashMap;
 use http::header::{HeaderName, HeaderValue};
 
 /// A set of HTTP headers
@@ -10,7 +9,7 @@ use http::header::{HeaderName, HeaderValue};
 /// `HeaderMap` is an multi-map of [`HeaderName`] to values.
 #[derive(Debug, Clone)]
 pub struct HeaderMap {
-    pub(crate) inner: FxHashMap<HeaderName, Value>,
+    pub(crate) inner: AHashMap<HeaderName, Value>,
 }
 
 #[derive(Debug, Clone)]
@@ -55,7 +54,7 @@ impl HeaderMap {
     /// allocate.
     pub fn new() -> Self {
         HeaderMap {
-            inner: FxHashMap::default(),
+            inner: AHashMap::default(),
         }
     }
 
@@ -69,7 +68,7 @@ impl HeaderMap {
     /// More capacity than requested may be allocated.
     pub fn with_capacity(capacity: usize) -> HeaderMap {
         HeaderMap {
-            inner: FxHashMap::with_capacity_and_hasher(capacity, Default::default()),
+            inner: AHashMap::with_capacity_and_hasher(capacity, Default::default()),
         }
     }
 
diff --git a/actix-http/src/header/mod.rs b/actix-http/src/header/mod.rs
index 0f87516eb..4a74dfb17 100644
--- a/actix-http/src/header/mod.rs
+++ b/actix-http/src/header/mod.rs
@@ -1,8 +1,6 @@
-//! Various http headers
-// This is mostly copy of [hyper](https://github.com/hyperium/hyper/tree/master/src/header)
+//! Various HTTP headers.
 
-use std::convert::TryFrom;
-use std::{fmt, str::FromStr};
+use std::{convert::TryFrom, fmt, str::FromStr};
 
 use bytes::{Bytes, BytesMut};
 use http::Error as HttpError;