diff --git a/CHANGES.md b/CHANGES.md
index 3a5a68de4..e5de591f0 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -5,8 +5,14 @@
 ### Fixed
 
 * Fix system_exit in HttpServer #501
+
 * Fix parsing of route param containin regexes with repetition #500
 
+### Changes
+
+* Unhide `SessionBackend` and `SessionImpl` traits #455
+
+
 ## [0.7.5] - 2018-09-04
 
 ### Added
diff --git a/Cargo.toml b/Cargo.toml
index 704eac47a..6855c0ead 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -101,6 +101,7 @@ tokio-io = "0.1"
 tokio-tcp = "0.1"
 tokio-timer = "0.2"
 tokio-reactor = "0.1"
+tokio-current-thread = "0.1"
 
 # native-tls
 native-tls = { version="0.2", optional = true }
diff --git a/src/client/connector.rs b/src/client/connector.rs
index 239a00c5e..896f98a41 100644
--- a/src/client/connector.rs
+++ b/src/client/connector.rs
@@ -204,6 +204,7 @@ impl Paused {
 /// `ClientConnector` type is responsible for transport layer of a
 /// client connection.
 pub struct ClientConnector {
+    #[allow(dead_code)]
     connector: SslConnector,
 
     stats: ClientConnectorStats,
diff --git a/src/lib.rs b/src/lib.rs
index f57ab937e..2559f6460 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -118,6 +118,7 @@ extern crate parking_lot;
 extern crate rand;
 extern crate slab;
 extern crate tokio;
+extern crate tokio_current_thread;
 extern crate tokio_io;
 extern crate tokio_reactor;
 extern crate tokio_tcp;
diff --git a/src/middleware/session.rs b/src/middleware/session.rs
index 7bf5c0e95..e8b0e5558 100644
--- a/src/middleware/session.rs
+++ b/src/middleware/session.rs
@@ -270,14 +270,17 @@ impl<S: 'static, T: SessionBackend<S>> Middleware<S> for SessionStorage<T, S> {
 }
 
 /// A simple key-value storage interface that is internally used by `Session`.
-#[doc(hidden)]
 pub trait SessionImpl: 'static {
+    /// Get session value by key
     fn get(&self, key: &str) -> Option<&str>;
 
+    /// Set session value
     fn set(&mut self, key: &str, value: String);
 
+    /// Remove specific key from session
     fn remove(&mut self, key: &str);
 
+    /// Remove all values from session
     fn clear(&mut self);
 
     /// Write session to storage backend.
@@ -285,9 +288,10 @@ pub trait SessionImpl: 'static {
 }
 
 /// Session's storage backend trait definition.
-#[doc(hidden)]
 pub trait SessionBackend<S>: Sized + 'static {
+    /// Session item
     type Session: SessionImpl;
+    /// Future that reads session
     type ReadFuture: Future<Item = Self::Session, Error = Error>;
 
     /// Parse the session from request and load data from a storage backend.
diff --git a/src/router.rs b/src/router.rs
index 4a0f672c5..ab84838f1 100644
--- a/src/router.rs
+++ b/src/router.rs
@@ -815,16 +815,21 @@ impl ResourceDef {
         Ok(())
     }
 
-    fn parse_param(
-        pattern: &str,
-    ) -> (PatternElement, String, &str) {
+    fn parse_param(pattern: &str) -> (PatternElement, String, &str) {
         const DEFAULT_PATTERN: &str = "[^/]+";
         let mut params_nesting = 0usize;
-        let close_idx = pattern.find(|c| match c {
-            '{' => {params_nesting += 1; false},
-            '}' => {params_nesting -= 1; params_nesting == 0},
-            _ => false
-        }).expect("malformed param");
+        let close_idx = pattern
+            .find(|c| match c {
+                '{' => {
+                    params_nesting += 1;
+                    false
+                }
+                '}' => {
+                    params_nesting -= 1;
+                    params_nesting == 0
+                }
+                _ => false,
+            }).expect("malformed param");
         let (mut param, rem) = pattern.split_at(close_idx + 1);
         param = &param[1..param.len() - 1]; // Remove outer brackets
         let (name, pattern) = match param.find(":") {
@@ -832,16 +837,25 @@ impl ResourceDef {
                 let (name, pattern) = param.split_at(idx);
                 (name, &pattern[1..])
             }
-            None => (param, DEFAULT_PATTERN)
+            None => (param, DEFAULT_PATTERN),
         };
-        (PatternElement::Var(name.to_string()), format!(r"(?P<{}>{})", &name, &pattern), rem)
+        (
+            PatternElement::Var(name.to_string()),
+            format!(r"(?P<{}>{})", &name, &pattern),
+            rem,
+        )
     }
 
     fn parse(
         mut pattern: &str, for_prefix: bool,
     ) -> (String, Vec<PatternElement>, bool, usize) {
         if pattern.find("{").is_none() {
-            return (String::from(pattern), vec![PatternElement::Str(String::from(pattern))], false, pattern.chars().count())
+            return (
+                String::from(pattern),
+                vec![PatternElement::Str(String::from(pattern))],
+                false,
+                pattern.chars().count(),
+            );
         };
 
         let mut elems = Vec::new();
diff --git a/src/server/http.rs b/src/server/http.rs
index ed463f75d..eafd45a3f 100644
--- a/src/server/http.rs
+++ b/src/server/http.rs
@@ -3,12 +3,12 @@ use std::rc::Rc;
 use std::sync::Arc;
 use std::{io, mem, net, time};
 
-use actix::{Actor, Addr, Arbiter, AsyncContext, Context, Handler, System};
+use actix::{Actor, Addr, AsyncContext, Context, Handler, System};
 
 use futures::{Future, Stream};
 use net2::{TcpBuilder, TcpStreamExt};
 use num_cpus;
-use tokio::executor::current_thread;
+use tokio_current_thread::spawn;
 use tokio_io::{AsyncRead, AsyncWrite};
 use tokio_tcp::TcpStream;
 
@@ -585,7 +585,7 @@ where
     type Result = ();
 
     fn handle(&mut self, msg: Conn<T>, _: &mut Context<Self>) -> Self::Result {
-        Arbiter::spawn(HttpChannel::new(
+        spawn(HttpChannel::new(
             Rc::clone(&self.settings),
             msg.io,
             msg.peer,
@@ -693,7 +693,7 @@ where
         };
         let _ = io.set_nodelay(true);
 
-        current_thread::spawn(HttpChannel::new(h, io, peer));
+        spawn(HttpChannel::new(h, io, peer));
     }
 }
 
@@ -753,10 +753,10 @@ where
         let _ = io.set_nodelay(true);
 
         let rate = h.connection_rate();
-        current_thread::spawn(self.acceptor.accept(io).then(move |res| {
+        spawn(self.acceptor.accept(io).then(move |res| {
             drop(rate);
             match res {
-                Ok(io) => current_thread::spawn(HttpChannel::new(h, io, peer)),
+                Ok(io) => spawn(HttpChannel::new(h, io, peer)),
                 Err(err) => trace!("Can not establish connection: {}", err),
             }
             Ok(())