diff --git a/CHANGES.md b/CHANGES.md
index 689ab13dd..bbb13d7b6 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -2,6 +2,10 @@
 
 ## [1.0.9] - 2019-xx-xx
 
+### Deleted
+
+* Removed hashbrown dependency as it is [core in rust 1.36.0](https://github.com/rust-lang/rust/blob/master/RELEASES.md#version-1360-2019-07-04)
+
 ### Added
 
 * Add `Payload::into_inner` method and make stored `def::Payload` public. (#1110)
diff --git a/Cargo.toml b/Cargo.toml
index 35ca28b2c..0ff8694e2 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -89,7 +89,6 @@ bytes = "0.4"
 derive_more = "0.15.0"
 encoding_rs = "0.8"
 futures = "0.1.25"
-hashbrown = "0.5.0"
 log = "0.4"
 mime = "0.3"
 net2 = "0.2.33"
diff --git a/actix-http/CHANGES.md b/actix-http/CHANGES.md
index 624aca5eb..9edc0b696 100644
--- a/actix-http/CHANGES.md
+++ b/actix-http/CHANGES.md
@@ -2,6 +2,10 @@
 
 ## Not released yet
 
+### Deleted
+
+* Removed hashbrown dependency as it is [core in rust 1.36.0](https://github.com/rust-lang/rust/blob/master/RELEASES.md#version-1360-2019-07-04)
+
 ### Added
 
 * Add support for serde_json::Value to be passed as argument to ResponseBuilder.body()
diff --git a/actix-http/Cargo.toml b/actix-http/Cargo.toml
index cc7c885e7..581dc2cd4 100644
--- a/actix-http/Cargo.toml
+++ b/actix-http/Cargo.toml
@@ -62,7 +62,6 @@ derive_more = "0.15.0"
 either = "1.5.2"
 encoding_rs = "0.8"
 futures = "0.1.25"
-hashbrown = "0.5.0"
 h2 = "0.1.16"
 http = "0.1.17"
 httparse = "1.3"
diff --git a/actix-http/README.md b/actix-http/README.md
index d75e822ba..769c22d4a 100644
--- a/actix-http/README.md
+++ b/actix-http/README.md
@@ -8,7 +8,7 @@ Actix http
 * [API Documentation](https://docs.rs/actix-http/)
 * [Chat on gitter](https://gitter.im/actix/actix)
 * Cargo package: [actix-http](https://crates.io/crates/actix-http)
-* Minimum supported Rust version: 1.31 or later
+* Minimum supported Rust version: 1.36 or later
 
 ## Example
 
diff --git a/actix-http/src/client/pool.rs b/actix-http/src/client/pool.rs
index a3522ff8a..f4af3fde3 100644
--- a/actix-http/src/client/pool.rs
+++ b/actix-http/src/client/pool.rs
@@ -12,7 +12,7 @@ use futures::task::AtomicTask;
 use futures::unsync::oneshot;
 use futures::{Async, Future, Poll};
 use h2::client::{handshake, Handshake};
-use hashbrown::HashMap;
+use std::collections::HashMap;
 use http::uri::Authority;
 use indexmap::IndexSet;
 use slab::Slab;
diff --git a/actix-http/src/extensions.rs b/actix-http/src/extensions.rs
index c6266f56e..2bd0bf2f2 100644
--- a/actix-http/src/extensions.rs
+++ b/actix-http/src/extensions.rs
@@ -1,7 +1,7 @@
 use std::any::{Any, TypeId};
 use std::fmt;
 
-use hashbrown::HashMap;
+use std::collections::HashMap;
 
 #[derive(Default)]
 /// A type map of request extensions.
diff --git a/actix-http/src/header/map.rs b/actix-http/src/header/map.rs
index f2f1ba51c..9d2a0081c 100644
--- a/actix-http/src/header/map.rs
+++ b/actix-http/src/header/map.rs
@@ -1,6 +1,6 @@
 use either::Either;
-use hashbrown::hash_map::{self, Entry};
-use hashbrown::HashMap;
+use std::collections::hash_map::{self, Entry};
+use std::collections::HashMap;
 use http::header::{HeaderName, HeaderValue};
 use http::HttpTryFrom;
 
diff --git a/actix-session/CHANGES.md b/actix-session/CHANGES.md
index d85f6d5f1..de856640f 100644
--- a/actix-session/CHANGES.md
+++ b/actix-session/CHANGES.md
@@ -1,5 +1,11 @@
 # Changes
 
+## Not released yet
+
+### Deleted
+
+* Removed hashbrown dependency as it is [core in rust 1.36.0](https://github.com/rust-lang/rust/blob/master/RELEASES.md#version-1360-2019-07-04)
+
 ## [0.2.0] - 2019-07-08
 
 *  Enhanced ``actix-session`` to facilitate state changes.  Use ``Session.renew()``
diff --git a/actix-session/Cargo.toml b/actix-session/Cargo.toml
index d973661ef..833c6e46f 100644
--- a/actix-session/Cargo.toml
+++ b/actix-session/Cargo.toml
@@ -29,7 +29,6 @@ actix-service = "0.4.1"
 bytes = "0.4"
 derive_more = "0.15.0"
 futures = "0.1.25"
-hashbrown = "0.5.0"
 serde = "1.0"
 serde_json = "1.0"
 time = "0.1.42"
diff --git a/actix-session/README.md b/actix-session/README.md
index 0aee756fd..33c9b4f43 100644
--- a/actix-session/README.md
+++ b/actix-session/README.md
@@ -6,4 +6,4 @@
 * [API Documentation](https://docs.rs/actix-session/)
 * [Chat on gitter](https://gitter.im/actix/actix)
 * Cargo package: [actix-session](https://crates.io/crates/actix-session)
-* Minimum supported Rust version: 1.34 or later
+* Minimum supported Rust version: 1.36 or later
diff --git a/actix-session/src/lib.rs b/actix-session/src/lib.rs
index 2e9e51714..6da9e5404 100644
--- a/actix-session/src/lib.rs
+++ b/actix-session/src/lib.rs
@@ -47,7 +47,7 @@ use std::rc::Rc;
 
 use actix_web::dev::{Extensions, Payload, ServiceRequest, ServiceResponse};
 use actix_web::{Error, FromRequest, HttpMessage, HttpRequest};
-use hashbrown::HashMap;
+use std::collections::HashMap;
 use serde::de::DeserializeOwned;
 use serde::Serialize;
 use serde_json;
diff --git a/src/middleware/errhandlers.rs b/src/middleware/errhandlers.rs
index 5f73d4d7e..fba486812 100644
--- a/src/middleware/errhandlers.rs
+++ b/src/middleware/errhandlers.rs
@@ -4,7 +4,7 @@ use std::rc::Rc;
 use actix_service::{Service, Transform};
 use futures::future::{err, ok, Either, Future, FutureResult};
 use futures::Poll;
-use hashbrown::HashMap;
+use std::collections::HashMap;
 
 use crate::dev::{ServiceRequest, ServiceResponse};
 use crate::error::{Error, Result};
diff --git a/src/rmap.rs b/src/rmap.rs
index 42ddb1349..f9138b911 100644
--- a/src/rmap.rs
+++ b/src/rmap.rs
@@ -2,7 +2,7 @@ use std::cell::RefCell;
 use std::rc::Rc;
 
 use actix_router::ResourceDef;
-use hashbrown::HashMap;
+use std::collections::HashMap;
 use url::Url;
 
 use crate::error::UrlGenerationError;