diff --git a/examples/errors/Cargo.toml b/examples/errors/Cargo.toml
index 0b605e2..ed0f4f6 100644
--- a/examples/errors/Cargo.toml
+++ b/examples/errors/Cargo.toml
@@ -4,7 +4,9 @@ version = "1.0.0"
 edition = "2018"
 
 [dependencies]
-actix-web = "1.0"
-failure = "0.1"
-env_logger = "0.6"
-log = "0.4"
+actix-web = "2.0.0"
+actix-rt = "1.0.0"
+env_logger = "0.7.1"
+log = "0.4.8"
+failure = "0.1.6"
+actix-http = "1.0.1"
diff --git a/examples/errors/src/helpers.rs b/examples/errors/src/helpers.rs
index 6dc01fd..690a2d2 100644
--- a/examples/errors/src/helpers.rs
+++ b/examples/errors/src/helpers.rs
@@ -7,19 +7,19 @@ struct MyError {
     name: &'static str,
 }
 
-pub fn index() -> Result<&'static str> {
+async fn index() -> Result<&'static str> {
     let result: Result<&'static str, MyError> = Err(MyError { name: "test error" });
 
     Ok(result.map_err(|e| error::ErrorBadRequest(e.name))?)
 }
 // </helpers>
 
-pub fn main() {
+#[actix_rt::main]
+async fn main() -> std::io::Result<()> {
     use actix_web::HttpServer;
 
     HttpServer::new(|| App::new().route("/", web::get().to(index)))
-        .bind("127.0.0.1:8088")
-        .unwrap()
+        .bind("127.0.0.1:8088")?
         .run()
-        .unwrap();
+        .await
 }
diff --git a/examples/errors/src/logging.rs b/examples/errors/src/logging.rs
index 9f5b880..5e4987d 100644
--- a/examples/errors/src/logging.rs
+++ b/examples/errors/src/logging.rs
@@ -12,13 +12,14 @@ pub struct MyError {
 // Use default implementation for `error_response()` method
 impl error::ResponseError for MyError {}
 
-pub fn index() -> Result<&'static str, MyError> {
+async fn index() -> Result<&'static str, MyError> {
     let err = MyError { name: "test error" };
     debug!("{}", err);
     Err(err)
 }
 
-pub fn main() {
+#[actix_rt::main]
+async fn main() -> std::io::Result<()> {
     use actix_web::{middleware::Logger, web, App, HttpServer};
 
     std::env::set_var("RUST_LOG", "my_errors=debug,actix_web=info");
@@ -30,9 +31,8 @@ pub fn main() {
             .wrap(Logger::default())
             .route("/", web::get().to(index))
     })
-    .bind("127.0.0.1:8088")
-    .unwrap()
+    .bind("127.0.0.1:8088")?
     .run()
-    .unwrap();
+    .await
 }
 // </logging>
diff --git a/examples/errors/src/main.rs b/examples/errors/src/main.rs
index c9e4984..ac6d13b 100644
--- a/examples/errors/src/main.rs
+++ b/examples/errors/src/main.rs
@@ -10,24 +10,24 @@ use failure::Fail;
 
 #[derive(Fail, Debug)]
 #[fail(display = "my error")]
-pub struct MyError {
+struct MyError {
     name: &'static str,
 }
 
 // Use default implementation for `error_response()` method
 impl error::ResponseError for MyError {}
 
-fn index() -> Result<&'static str, MyError> {
+async fn index() -> Result<&'static str, MyError> {
     Err(MyError { name: "test" })
 }
 // </response-error>
 
-pub fn main() {
+#[actix_rt::main]
+async fn main() -> std::io::Result<()> {
     use actix_web::{web, App, HttpServer};
 
     HttpServer::new(|| App::new().route("/", web::get().to(index)))
-        .bind("127.0.0.1:8088")
-        .unwrap()
+        .bind("127.0.0.1:8088")?
         .run()
-        .unwrap();
+        .await
 }
diff --git a/examples/errors/src/override_error.rs b/examples/errors/src/override_error.rs
index 0f354cd..ad7c786 100644
--- a/examples/errors/src/override_error.rs
+++ b/examples/errors/src/override_error.rs
@@ -1,6 +1,7 @@
 use actix_web::{web, App};
 // <override>
-use actix_web::{error, http, HttpResponse};
+use actix_http::ResponseBuilder;
+use actix_web::{error, http::header, http::StatusCode, HttpResponse};
 use failure::Fail;
 
 #[derive(Fail, Debug)]
@@ -15,30 +16,35 @@ enum MyError {
 
 impl error::ResponseError for MyError {
     fn error_response(&self) -> HttpResponse {
+        ResponseBuilder::new(self.status_code())
+            .set_header(header::CONTENT_TYPE, "text/html; charset=utf-8")
+            .body(self.to_string())
+    }
+
+    fn status_code(&self) -> StatusCode {
         match *self {
-            MyError::InternalError => {
-                HttpResponse::new(http::StatusCode::INTERNAL_SERVER_ERROR)
-            }
-            MyError::BadClientData => HttpResponse::new(http::StatusCode::BAD_REQUEST),
-            MyError::Timeout => HttpResponse::new(http::StatusCode::GATEWAY_TIMEOUT),
+            MyError::InternalError => StatusCode::INTERNAL_SERVER_ERROR,
+            MyError::BadClientData => StatusCode::BAD_REQUEST,
+            MyError::Timeout => StatusCode::GATEWAY_TIMEOUT,
         }
     }
 }
 
-fn index() -> Result<&'static str, MyError> {
+async fn index() -> Result<&'static str, MyError> {
     Err(MyError::BadClientData)
 }
 // </override>
 
-fn error2() -> Result<&'static str, MyError> {
+async fn error2() -> Result<&'static str, MyError> {
     Err(MyError::InternalError)
 }
 
-fn error3() -> Result<&'static str, MyError> {
+async fn error3() -> Result<&'static str, MyError> {
     Err(MyError::Timeout)
 }
 
-pub fn main() {
+#[actix_rt::main]
+async fn main() -> std::io::Result<()> {
     use actix_web::HttpServer;
 
     HttpServer::new(|| {
@@ -47,8 +53,7 @@ pub fn main() {
             .route("/e2", web::get().to(error2))
             .route("/e3", web::get().to(error3))
     })
-    .bind("127.0.0.1:8088")
-    .unwrap()
+    .bind("127.0.0.1:8088")?
     .run()
-    .unwrap();
+    .await
 }
diff --git a/examples/errors/src/recommend_one.rs b/examples/errors/src/recommend_one.rs
index 5e8e4f2..1d42e4e 100644
--- a/examples/errors/src/recommend_one.rs
+++ b/examples/errors/src/recommend_one.rs
@@ -1,5 +1,6 @@
 // <recommend-one>
-use actix_web::{error, http, HttpResponse};
+use actix_http::ResponseBuilder;
+use actix_web::{error, http::header, http::StatusCode, HttpResponse};
 use failure::Fail;
 
 #[derive(Fail, Debug)]
@@ -10,26 +11,29 @@ enum UserError {
 
 impl error::ResponseError for UserError {
     fn error_response(&self) -> HttpResponse {
+        ResponseBuilder::new(self.status_code())
+            .set_header(header::CONTENT_TYPE, "text/html; charset=utf-8")
+            .body(self.to_string())
+    }
+    fn status_code(&self) -> StatusCode {
         match *self {
-            UserError::ValidationError { .. } => {
-                HttpResponse::new(http::StatusCode::BAD_REQUEST)
-            }
+            UserError::ValidationError { .. } => StatusCode::BAD_REQUEST,
         }
     }
 }
 // </recommend-one>
-fn index() -> Result<&'static str, UserError> {
+async fn index() -> Result<&'static str, UserError> {
     Err(UserError::ValidationError {
         field: "bad stuff".to_string(),
     })
 }
 
-pub fn main() {
+#[actix_rt::main]
+async fn main() -> std::io::Result<()> {
     use actix_web::{web, App, HttpServer};
 
     HttpServer::new(|| App::new().route("/", web::get().to(index)))
-        .bind("127.0.0.1:8088")
-        .unwrap()
+        .bind("127.0.0.1:8088")?
         .run()
-        .unwrap();
+        .await
 }
diff --git a/examples/errors/src/recommend_two.rs b/examples/errors/src/recommend_two.rs
index cbb34de..b189428 100644
--- a/examples/errors/src/recommend_two.rs
+++ b/examples/errors/src/recommend_two.rs
@@ -1,5 +1,6 @@
 // <recommend-two>
-use actix_web::{error, http, HttpResponse};
+use actix_http::ResponseBuilder;
+use actix_web::{error, http::header, http::StatusCode, HttpResponse};
 use failure::Fail;
 
 #[derive(Fail, Debug)]
@@ -10,15 +11,18 @@ enum UserError {
 
 impl error::ResponseError for UserError {
     fn error_response(&self) -> HttpResponse {
+        ResponseBuilder::new(self.status_code())
+            .set_header(header::CONTENT_TYPE, "text/html; charset=utf-8")
+            .body(self.to_string())
+    }
+    fn status_code(&self) -> StatusCode {
         match *self {
-            UserError::InternalError => {
-                HttpResponse::new(http::StatusCode::INTERNAL_SERVER_ERROR)
-            }
+            UserError::InternalError => StatusCode::INTERNAL_SERVER_ERROR,
         }
     }
 }
 
-fn index() -> Result<&'static str, UserError> {
+async fn index() -> Result<&'static str, UserError> {
     do_thing_that_failes().map_err(|_e| UserError::InternalError)?;
     Ok("success!")
 }
@@ -28,12 +32,12 @@ fn do_thing_that_failes() -> Result<(), std::io::Error> {
     Err(std::io::Error::new(std::io::ErrorKind::Other, "some error"))
 }
 
-pub fn main() {
+#[actix_rt::main]
+async fn main() -> std::io::Result<()> {
     use actix_web::{web, App, HttpServer};
 
     HttpServer::new(|| App::new().route("/", web::get().to(index)))
-        .bind("127.0.0.1:8088")
-        .unwrap()
+        .bind("127.0.0.1:8088")?
         .run()
-        .unwrap();
+        .await
 }
diff --git a/examples/extractors/Cargo.toml b/examples/extractors/Cargo.toml
index 0e31c27..8cc6c12 100644
--- a/examples/extractors/Cargo.toml
+++ b/examples/extractors/Cargo.toml
@@ -4,7 +4,8 @@ version = "1.0.0"
 edition = "2018"
 
 [dependencies]
-actix-web = "1.0"
+actix-web = "2.0"
+actix-rt = "1.0"
 serde = "1.0"
-futures = "0.1"
+futures = "0.3"
 serde_json = "1.0"
diff --git a/examples/extractors/src/form.rs b/examples/extractors/src/form.rs
index daf58cf..43dc763 100644
--- a/examples/extractors/src/form.rs
+++ b/examples/extractors/src/form.rs
@@ -10,17 +10,17 @@ struct FormData {
 /// extract form data using serde
 /// this handler gets called only if the content type is *x-www-form-urlencoded*
 /// and the content of the request could be deserialized to a `FormData` struct
-fn index(form: web::Form<FormData>) -> Result<String> {
+async fn index(form: web::Form<FormData>) -> Result<String> {
     Ok(format!("Welcome {}!", form.username))
 }
 // </form>
 
-pub fn main() {
+#[actix_rt::main]
+async fn main() -> std::io::Result<()> {
     use actix_web::{App, HttpServer};
 
     HttpServer::new(|| App::new().route("/", web::post().to(index)))
-        .bind("127.0.0.1:8088")
-        .unwrap()
+        .bind("127.0.0.1:8088")?
         .run()
-        .unwrap();
+        .await
 }
diff --git a/examples/extractors/src/json_one.rs b/examples/extractors/src/json_one.rs
index d1600ce..b5c2675 100644
--- a/examples/extractors/src/json_one.rs
+++ b/examples/extractors/src/json_one.rs
@@ -8,17 +8,17 @@ struct Info {
 }
 
 /// deserialize `Info` from request's body
-fn index(info: web::Json<Info>) -> Result<String> {
+async fn index(info: web::Json<Info>) -> Result<String> {
     Ok(format!("Welcome {}!", info.username))
 }
 // </json-one>
 
-pub fn main() {
+#[actix_rt::main]
+async fn main() -> std::io::Result<()> {
     use actix_web::{App, HttpServer};
 
     HttpServer::new(|| App::new().route("/", web::post().to(index)))
-        .bind("127.0.0.1:8088")
-        .unwrap()
+        .bind("127.0.0.1:8088")?
         .run()
-        .unwrap();
+        .await
 }
diff --git a/examples/extractors/src/json_two.rs b/examples/extractors/src/json_two.rs
index a61a6cf..a619655 100644
--- a/examples/extractors/src/json_two.rs
+++ b/examples/extractors/src/json_two.rs
@@ -8,11 +8,12 @@ struct Info {
 }
 
 /// deserialize `Info` from request's body, max payload size is 4kb
-fn index(info: web::Json<Info>) -> impl Responder {
+async fn index(info: web::Json<Info>) -> impl Responder {
     format!("Welcome {}!", info.username)
 }
 
-pub fn main() {
+#[actix_rt::main]
+async fn main() -> std::io::Result<()> {
     use actix_web::{App, HttpServer};
 
     HttpServer::new(|| {
@@ -34,9 +35,8 @@ pub fn main() {
                 .route(web::post().to(index)),
         )
     })
-    .bind("127.0.0.1:8088")
-    .unwrap()
+    .bind("127.0.0.1:8088")?
     .run()
-    .unwrap();
+    .await
 }
 // </json-two>
diff --git a/examples/extractors/src/main.rs b/examples/extractors/src/main.rs
index 0925a79..07f40a2 100644
--- a/examples/extractors/src/main.rs
+++ b/examples/extractors/src/main.rs
@@ -1,5 +1,4 @@
 use actix_web::{web, App, FromRequest, HttpRequest, HttpServer, Responder};
-use futures::future::Future;
 use serde::Deserialize;
 
 // pub mod custom_handler;
@@ -19,31 +18,34 @@ struct MyInfo {
 }
 
 // <option-one>
-fn index(path: web::Path<(String, String)>, json: web::Json<MyInfo>) -> impl Responder {
+async fn index(
+    path: web::Path<(String, String)>,
+    json: web::Json<MyInfo>,
+) -> impl Responder {
     format!("{} {} {} {}", path.0, path.1, json.id, json.username)
 }
 // </option-one>
 
 // <option-two>
-fn extract(req: HttpRequest) -> impl Responder {
-    let params = web::Path::<(String, String)>::extract(&req).unwrap();
+async fn extract(req: HttpRequest) -> impl Responder {
+    let params = web::Path::<(String, String)>::extract(&req).await.unwrap();
 
     let info = web::Json::<MyInfo>::extract(&req)
-        .wait()
+        .await
         .expect("Err with reading json.");
 
     format!("{} {} {} {}", params.0, params.1, info.username, info.id)
 }
 // </option-two>
 
-fn main() {
+#[actix_rt::main]
+async fn main() -> std::io::Result<()> {
     HttpServer::new(|| {
         App::new()
             .route("/{name}/{id}", web::post().to(index))
             .route("/{name}/{id}/extract", web::post().to(extract))
     })
-    .bind("127.0.0.1:8088")
-    .unwrap()
+    .bind("127.0.0.1:8088")?
     .run()
-    .unwrap();
+    .await
 }
diff --git a/examples/extractors/src/multiple.rs b/examples/extractors/src/multiple.rs
index 31411a7..2a1cc09 100644
--- a/examples/extractors/src/multiple.rs
+++ b/examples/extractors/src/multiple.rs
@@ -7,14 +7,15 @@ struct Info {
     username: String,
 }
 
-fn index((path, query): (web::Path<(u32, String)>, web::Query<Info>)) -> String {
+async fn index((path, query): (web::Path<(u32, String)>, web::Query<Info>)) -> String {
     format!(
         "Welcome {}, friend {}, userid {}!",
         query.username, path.1, path.0
     )
 }
 
-pub fn main() {
+#[actix_rt::main]
+async fn main() -> std::io::Result<()> {
     use actix_web::{App, HttpServer};
 
     HttpServer::new(|| {
@@ -23,9 +24,8 @@ pub fn main() {
             web::get().to(index),
         )
     })
-    .bind("127.0.0.1:8088")
-    .unwrap()
+    .bind("127.0.0.1:8088")?
     .run()
-    .unwrap();
+    .await
 }
 // </multi>
diff --git a/examples/extractors/src/path_one.rs b/examples/extractors/src/path_one.rs
index 1440b8e..a378ba2 100644
--- a/examples/extractors/src/path_one.rs
+++ b/examples/extractors/src/path_one.rs
@@ -4,11 +4,12 @@ use actix_web::{web, Result};
 /// extract path info from "/users/{userid}/{friend}" url
 /// {userid} -  - deserializes to a u32
 /// {friend} - deserializes to a String
-fn index(info: web::Path<(u32, String)>) -> Result<String> {
+async fn index(info: web::Path<(u32, String)>) -> Result<String> {
     Ok(format!("Welcome {}, userid {}!", info.1, info.0))
 }
 
-pub fn main() {
+#[actix_rt::main]
+async fn main() -> std::io::Result<()> {
     use actix_web::{App, HttpServer};
 
     HttpServer::new(|| {
@@ -17,9 +18,8 @@ pub fn main() {
             web::get().to(index),
         )
     })
-    .bind("127.0.0.1:8088")
-    .unwrap()
+    .bind("127.0.0.1:8088")?
     .run()
-    .unwrap();
+    .await
 }
 // </path-one>
diff --git a/examples/extractors/src/path_three.rs b/examples/extractors/src/path_three.rs
index 68badaa..98484c5 100644
--- a/examples/extractors/src/path_three.rs
+++ b/examples/extractors/src/path_three.rs
@@ -1,14 +1,15 @@
 use actix_web::{web, HttpRequest, Result};
 
 // <path-three>
-fn index(req: HttpRequest) -> Result<String> {
+async fn index(req: HttpRequest) -> Result<String> {
     let name: String = req.match_info().get("friend").unwrap().parse().unwrap();
     let userid: i32 = req.match_info().query("userid").parse().unwrap();
 
     Ok(format!("Welcome {}, userid {}!", name, userid))
 }
 
-pub fn main() {
+#[actix_rt::main]
+async fn main() -> std::io::Result<()> {
     use actix_web::{App, HttpServer};
 
     HttpServer::new(|| {
@@ -17,9 +18,8 @@ pub fn main() {
             web::get().to(index),
         )
     })
-    .bind("127.0.0.1:8088")
-    .unwrap()
+    .bind("127.0.0.1:8088")?
     .run()
-    .unwrap();
+    .await
 }
 // </path-three>
diff --git a/examples/extractors/src/path_two.rs b/examples/extractors/src/path_two.rs
index ee5e357..764ddfe 100644
--- a/examples/extractors/src/path_two.rs
+++ b/examples/extractors/src/path_two.rs
@@ -9,11 +9,12 @@ struct Info {
 }
 
 /// extract path info using serde
-fn index(info: web::Path<Info>) -> Result<String> {
+async fn index(info: web::Path<Info>) -> Result<String> {
     Ok(format!("Welcome {}, userid {}!", info.friend, info.userid))
 }
 
-pub fn main() {
+#[actix_rt::main]
+async fn main() -> std::io::Result<()> {
     use actix_web::{App, HttpServer};
 
     HttpServer::new(|| {
@@ -22,9 +23,8 @@ pub fn main() {
             web::get().to(index),
         )
     })
-    .bind("127.0.0.1:8088")
-    .unwrap()
+    .bind("127.0.0.1:8088")?
     .run()
-    .unwrap();
+    .await
 }
 // </path-two>
diff --git a/examples/extractors/src/query.rs b/examples/extractors/src/query.rs
index 74575ab..23d4480 100644
--- a/examples/extractors/src/query.rs
+++ b/examples/extractors/src/query.rs
@@ -8,17 +8,17 @@ struct Info {
 }
 
 // this handler get called only if the request's query contains `username` field
-fn index(info: web::Query<Info>) -> String {
+async fn index(info: web::Query<Info>) -> String {
     format!("Welcome {}!", info.username)
 }
 // </query>
 
-pub fn main() {
+#[actix_rt::main]
+async fn main() -> std::io::Result<()> {
     use actix_web::{App, HttpServer};
 
     HttpServer::new(|| App::new().route("/", web::get().to(index)))
-        .bind("127.0.0.1:8088")
-        .unwrap()
+        .bind("127.0.0.1:8088")?
         .run()
-        .unwrap();
+        .await
 }