diff --git a/Cargo.toml b/Cargo.toml
index 9ca0adc66..a3aa59866 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -27,15 +27,16 @@ flate2 = { version = "^1.0.7", default-features = false, features = ["rust_backe
 log = "0.4"
 mime = "0.3.7"
 mime_guess = "2.0"
+percent-encoding = "2.1"
 serde = "1.0"
 serde_json = "1.0"
-serde_urlencoded = "0.5"
+serde_urlencoded = "0.6.1"
 tokio = { version = "0.1.7", default-features = false, features = ["rt-full", "tcp"] }
 tokio-executor = "0.1.4" # a minimum version so trust-dns-resolver compiles
 tokio-io = "0.1"
 tokio-threadpool = "0.1.8" # a minimum version so tokio compiles
 tokio-timer = "0.2.6" # a minimum version so trust-dns-resolver compiles
-url = "1.2"
+url = "2.1"
 uuid = { version = "0.7", features = ["v4"] }
 
 # Optional deps...
@@ -49,7 +50,7 @@ socks = { version = "0.3.2", optional = true }
 tokio-rustls = { version = "0.10", optional = true }
 trust-dns-resolver = { version = "0.11", optional = true }
 webpki-roots = { version = "0.17", optional = true }
-cookie_store = "0.7.0"
+cookie_store = "0.9.0"
 cookie = "0.12.0"
 time = "0.1.42"
 
diff --git a/src/async_impl/multipart.rs b/src/async_impl/multipart.rs
index dfb06a15d..c2eb8c225 100644
--- a/src/async_impl/multipart.rs
+++ b/src/async_impl/multipart.rs
@@ -4,7 +4,7 @@ use std::fmt;
 
 use http::HeaderMap;
 use mime_guess::Mime;
-use url::percent_encoding::{self, EncodeSet, PATH_SEGMENT_ENCODE_SET};
+use percent_encoding::{self, AsciiSet, NON_ALPHANUMERIC};
 use uuid::Uuid;
 
 use futures::Stream;
@@ -386,33 +386,33 @@ impl PartMetadata {
     }
 }
 
-#[derive(Debug, Clone)]
-pub(crate) struct AttrCharEncodeSet;
-
-impl EncodeSet for AttrCharEncodeSet {
-    fn contains(&self, ch: u8) -> bool {
-        match ch as char {
-            '!' => false,
-            '#' => false,
-            '$' => false,
-            '&' => false,
-            '+' => false,
-            '-' => false,
-            '.' => false,
-            '^' => false,
-            '_' => false,
-            '`' => false,
-            '|' => false,
-            '~' => false,
-            _ => {
-                let is_alpha_numeric = ch >= 0x41 && ch <= 0x5a
-                    || ch >= 0x61 && ch <= 0x7a
-                    || ch >= 0x30 && ch <= 0x39;
-                !is_alpha_numeric
-            }
-        }
-    }
-}
+/// https://url.spec.whatwg.org/#fragment-percent-encode-set
+const FRAGMENT_ENCODE_SET: &AsciiSet = &percent_encoding::CONTROLS
+    .add(b' ')
+    .add(b'"')
+    .add(b'<')
+    .add(b'>')
+    .add(b'`');
+
+/// https://url.spec.whatwg.org/#path-percent-encode-set
+const PATH_ENCODE_SET: &AsciiSet = &FRAGMENT_ENCODE_SET.add(b'#').add(b'?').add(b'{').add(b'}');
+
+const PATH_SEGMENT_ENCODE_SET: &AsciiSet = &PATH_ENCODE_SET.add(b'/').add(b'%');
+
+/// https://tools.ietf.org/html/rfc8187#section-3.2.1
+const ATTR_CHAR_ENCODE_SET: &AsciiSet = &NON_ALPHANUMERIC
+    .remove(b'!')
+    .remove(b'#')
+    .remove(b'$')
+    .remove(b'&')
+    .remove(b'+')
+    .remove(b'-')
+    .remove(b'.')
+    .remove(b'^')
+    .remove(b'_')
+    .remove(b'`')
+    .remove(b'|')
+    .remove(b'~');
 
 pub(crate) enum PercentEncoding {
     PathSegment,
@@ -463,7 +463,7 @@ impl PercentEncoding {
                 percent_encoding::utf8_percent_encode(value, PATH_SEGMENT_ENCODE_SET).to_string()
             }
             PercentEncoding::AttrChar => {
-                percent_encoding::utf8_percent_encode(value, AttrCharEncodeSet).to_string()
+                percent_encoding::utf8_percent_encode(value, ATTR_CHAR_ENCODE_SET).to_string()
             }
             PercentEncoding::NoOp => value.to_string(),
         };
diff --git a/src/body.rs b/src/body.rs
index bea52e50d..dc17289bc 100644
--- a/src/body.rs
+++ b/src/body.rs
@@ -4,7 +4,7 @@ use std::io::{self, Cursor, Read};
 
 use bytes::Bytes;
 use futures::{try_ready, Future};
-use hyper::{self};
+use hyper;
 
 use crate::async_impl;
 
diff --git a/src/proxy.rs b/src/proxy.rs
index d2457a61e..7ee3661cb 100644
--- a/src/proxy.rs
+++ b/src/proxy.rs
@@ -1,16 +1,16 @@
 use std::fmt;
 #[cfg(feature = "socks")]
-use std::net::{SocketAddr, ToSocketAddrs};
+use std::net::SocketAddr;
 use std::sync::Arc;
 
 use crate::{IntoUrl, Url};
 use http::{header::HeaderValue, Uri};
 use hyper::client::connect::Destination;
+use percent_encoding::percent_decode;
 use std::collections::HashMap;
 use std::env;
 #[cfg(target_os = "windows")]
 use std::error::Error;
-use url::percent_encoding::percent_decode;
 #[cfg(target_os = "windows")]
 use winreg::enums::HKEY_CURRENT_USER;
 #[cfg(target_os = "windows")]
@@ -326,12 +326,14 @@ impl ProxyScheme {
         // Resolve URL to a host and port
         #[cfg(feature = "socks")]
         let to_addr = || {
-            let host_and_port = try_!(url.with_default_port(|url| match url.scheme() {
-                "socks5" | "socks5h" => Ok(1080),
-                _ => Err(()),
+            let addrs = try_!(url.socket_addrs(|| match url.scheme() {
+                "socks5" | "socks5h" => Some(1080),
+                _ => None,
             }));
-            let mut addr = try_!(host_and_port.to_socket_addrs());
-            addr.next().ok_or_else(crate::error::unknown_proxy_scheme)
+            addrs
+                .into_iter()
+                .next()
+                .ok_or_else(crate::error::unknown_proxy_scheme)
         };
 
         let mut scheme = match url.scheme() {