diff --git a/Cargo.toml b/Cargo.toml
index c0f52fc5..1e1917d9 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -32,7 +32,7 @@ libp2p-swarm = { version = "0.4.0-alpha.1", path = "swarm" }
 libp2p-uds = { version = "0.14.0-alpha.1", path = "transports/uds" }
 libp2p-wasm-ext = { version = "0.7.0-alpha.1", path = "transports/wasm-ext" }
 libp2p-yamux = { version = "0.14.0-alpha.1", path = "muxers/yamux" }
-parking_lot = "0.9.0"
+parking_lot = "0.10.0"
 smallvec = "1.0"
 wasm-timer = "0.2.4"
 
diff --git a/core/Cargo.toml b/core/Cargo.toml
index 1182120a..3bfb7522 100644
--- a/core/Cargo.toml
+++ b/core/Cargo.toml
@@ -12,9 +12,7 @@ categories = ["network-programming", "asynchronous"]
 [dependencies]
 asn1_der = "0.6.1"
 bs58 = "0.3.0"
-bytes = "0.5"
 ed25519-dalek = "1.0.0-pre.3"
-failure = "0.1"
 fnv = "1.0"
 futures = { version = "0.3.1", features = ["compat", "io-compat", "executor", "thread-pool"] }
 futures-timer = "2"
@@ -24,14 +22,14 @@ log = "0.4"
 multiaddr = { package = "parity-multiaddr", version = "0.7.0", path = "../misc/multiaddr" }
 multihash = { package = "parity-multihash", version = "0.2.1", path = "../misc/multihash" }
 multistream-select = { version = "0.7.0", path = "../misc/multistream-select" }
-parking_lot = "0.9.0"
+parking_lot = "0.10.0"
 pin-project = "0.4.6"
 protobuf = "=2.8.1" # note: see https://github.com/libp2p/rust-libp2p/issues/1363
-quick-error = "1.2"
 rand = "0.7"
 rw-stream-sink = { version = "0.2.0", path = "../misc/rw-stream-sink" }
 sha2 = "0.8.0"
 smallvec = "1.0"
+thiserror = "1.0"
 unsigned-varint = "0.3"
 void = "1"
 zeroize = "1"
diff --git a/core/src/identity/ed25519.rs b/core/src/identity/ed25519.rs
index 17b1dc27..f68e5d03 100644
--- a/core/src/identity/ed25519.rs
+++ b/core/src/identity/ed25519.rs
@@ -21,7 +21,6 @@
 //! Ed25519 keys.
 
 use ed25519_dalek as ed25519;
-use failure::Fail;
 use rand::RngCore;
 use super::error::DecodingError;
 use zeroize::Zeroize;
@@ -48,7 +47,7 @@ impl Keypair {
     pub fn decode(kp: &mut [u8]) -> Result<Keypair, DecodingError> {
         ed25519::Keypair::from_bytes(kp)
             .map(|k| { kp.zeroize(); Keypair(k) })
-            .map_err(|e| DecodingError::new("Ed25519 keypair").source(e.compat()))
+            .map_err(|e| DecodingError::new("Ed25519 keypair").source(e))
     }
 
     /// Sign a message using the private key of this keypair.
@@ -120,7 +119,7 @@ impl PublicKey {
     /// Decode a public key from a byte array as produced by `encode`.
     pub fn decode(k: &[u8]) -> Result<PublicKey, DecodingError> {
         ed25519::PublicKey::from_bytes(k)
-            .map_err(|e| DecodingError::new("Ed25519 public key").source(e.compat()))
+            .map_err(|e| DecodingError::new("Ed25519 public key").source(e))
             .map(PublicKey)
     }
 }
@@ -164,7 +163,7 @@ impl SecretKey {
     pub fn from_bytes(mut sk_bytes: impl AsMut<[u8]>) -> Result<SecretKey, DecodingError> {
         let sk_bytes = sk_bytes.as_mut();
         let secret = ed25519::SecretKey::from_bytes(&*sk_bytes)
-            .map_err(|e| DecodingError::new("Ed25519 secret key").source(e.compat()))?;
+            .map_err(|e| DecodingError::new("Ed25519 secret key").source(e))?;
         sk_bytes.zeroize();
         Ok(SecretKey(secret))
     }
diff --git a/core/src/peer_id.rs b/core/src/peer_id.rs
index ae659238..cb1ef39a 100644
--- a/core/src/peer_id.rs
+++ b/core/src/peer_id.rs
@@ -20,7 +20,7 @@
 
 use crate::PublicKey;
 use bs58;
-use quick_error::quick_error;
+use thiserror::Error;
 use multihash;
 use std::{convert::TryFrom, fmt, str::FromStr};
 
@@ -218,18 +218,12 @@ impl Into<multihash::Multihash> for PeerId {
     }
 }
 
-quick_error! {
-    #[derive(Debug)]
-    pub enum ParseError {
-        B58(e: bs58::decode::Error) {
-            display("base-58 decode error: {}", e)
-            cause(e)
-            from()
-        }
-        MultiHash {
-            display("decoding multihash failed")
-        }
-    }
+#[derive(Debug, Error)]
+pub enum ParseError {
+    #[error("base-58 decode error: {0}")]
+    B58(#[from] bs58::decode::Error),
+    #[error("decoding multihash failed")]
+    MultiHash,
 }
 
 impl FromStr for PeerId {
diff --git a/misc/mdns/Cargo.toml b/misc/mdns/Cargo.toml
index 43ee8e13..2e6a32c7 100644
--- a/misc/mdns/Cargo.toml
+++ b/misc/mdns/Cargo.toml
@@ -19,9 +19,8 @@ lazy_static = "1.2"
 libp2p-core = { version = "0.14.0-alpha.1", path = "../../core" }
 libp2p-swarm = { version = "0.4.0-alpha.1", path = "../../swarm" }
 log = "0.4"
-multiaddr = { package = "parity-multiaddr", version = "0.7.0", path = "../multiaddr" }
 net2 = "0.2"
-rand = "0.6"
+rand = "0.7"
 smallvec = "1.0"
 void = "1.0"
 wasm-timer = "0.2.4"
diff --git a/misc/mdns/src/service.rs b/misc/mdns/src/service.rs
index 790855ec..8620c93e 100644
--- a/misc/mdns/src/service.rs
+++ b/misc/mdns/src/service.rs
@@ -23,8 +23,7 @@ use async_std::net::UdpSocket;
 use dns_parser::{Packet, RData};
 use either::Either::{Left, Right};
 use futures::{future, prelude::*};
-use libp2p_core::{Multiaddr, PeerId};
-use multiaddr::Protocol;
+use libp2p_core::{multiaddr::{Multiaddr, Protocol}, PeerId};
 use std::{fmt, io, net::Ipv4Addr, net::SocketAddr, str, time::{Duration, Instant}};
 use wasm_timer::Interval;
 use lazy_static::lazy_static;
@@ -550,11 +549,10 @@ impl fmt::Debug for MdnsPeer {
 #[cfg(test)]
 mod tests {
     use futures::executor::block_on;
-    use libp2p_core::PeerId;
+    use libp2p_core::{PeerId, multiaddr::multihash::*};
     use std::{io::{Error, ErrorKind}, time::Duration};
     use wasm_timer::ext::TryFutureExt;
     use crate::service::{MdnsPacket, MdnsService};
-    use multiaddr::multihash::*;
 
     fn discover(peer_id: PeerId) {
         block_on(async {
diff --git a/misc/multiaddr/Cargo.toml b/misc/multiaddr/Cargo.toml
index a69d88a6..8b75d1da 100644
--- a/misc/multiaddr/Cargo.toml
+++ b/misc/multiaddr/Cargo.toml
@@ -22,8 +22,6 @@ url = { version = "2.1.0", default-features = false }
 
 [dev-dependencies]
 bincode = "1"
-bs58 = "0.3.0"
-data-encoding = "2"
 quickcheck = "0.9.0"
 rand = "0.7.2"
 serde_json = "1.0"
diff --git a/muxers/mplex/Cargo.toml b/muxers/mplex/Cargo.toml
index 0cbec20f..09ef4767 100644
--- a/muxers/mplex/Cargo.toml
+++ b/muxers/mplex/Cargo.toml
@@ -16,7 +16,7 @@ futures = "0.3.1"
 futures_codec = "0.3.4"
 libp2p-core = { version = "0.14.0-alpha.1", path = "../../core" }
 log = "0.4"
-parking_lot = "0.9"
+parking_lot = "0.10"
 unsigned-varint = { version = "0.3", features = ["futures-codec"] }
 
 [dev-dependencies]
diff --git a/muxers/yamux/Cargo.toml b/muxers/yamux/Cargo.toml
index b382e0d1..a536710c 100644
--- a/muxers/yamux/Cargo.toml
+++ b/muxers/yamux/Cargo.toml
@@ -13,6 +13,6 @@ categories = ["network-programming", "asynchronous"]
 futures = "0.3.1"
 libp2p-core = { version = "0.14.0-alpha.1", path = "../../core" }
 log = "0.4.8"
-parking_lot = "0.9"
+parking_lot = "0.10"
 thiserror = "1.0"
 yamux = "0.4"
diff --git a/protocols/deflate/Cargo.toml b/protocols/deflate/Cargo.toml
index abbb8ea0..257c4263 100644
--- a/protocols/deflate/Cargo.toml
+++ b/protocols/deflate/Cargo.toml
@@ -16,7 +16,6 @@ flate2 = "1.0"
 
 [dev-dependencies]
 async-std = "1.0"
-env_logger = "0.7.1"
 libp2p-tcp = { version = "0.14.0-alpha.1", path = "../../transports/tcp" }
 rand = "0.7"
 quickcheck = "0.9"
diff --git a/protocols/floodsub/Cargo.toml b/protocols/floodsub/Cargo.toml
index e099f7b8..15b66877 100644
--- a/protocols/floodsub/Cargo.toml
+++ b/protocols/floodsub/Cargo.toml
@@ -11,7 +11,6 @@ categories = ["network-programming", "asynchronous"]
 
 [dependencies]
 bs58 = "0.3.0"
-bytes = "0.5"
 cuckoofilter = "0.3.2"
 fnv = "1.0"
 futures = "0.3.1"
diff --git a/protocols/identify/Cargo.toml b/protocols/identify/Cargo.toml
index 53e75615..2594c8a6 100644
--- a/protocols/identify/Cargo.toml
+++ b/protocols/identify/Cargo.toml
@@ -10,21 +10,16 @@ keywords = ["peer-to-peer", "libp2p", "networking"]
 categories = ["network-programming", "asynchronous"]
 
 [dependencies]
-bytes = "0.5"
-futures_codec = "0.3.4"
 futures = "0.3.1"
 libp2p-core = { version = "0.14.0-alpha.1", path = "../../core" }
 libp2p-swarm = { version = "0.4.0-alpha.1", path = "../../swarm" }
 log = "0.4.1"
-multiaddr = { package = "parity-multiaddr", version = "0.7.0", path = "../../misc/multiaddr" }
 protobuf = "=2.8.1" # note: see https://github.com/libp2p/rust-libp2p/issues/1363
 smallvec = "1.0"
 wasm-timer = "0.2"
-unsigned-varint = { version = "0.3", features = ["futures-codec"] }
 
 [dev-dependencies]
 async-std = "1.0"
 libp2p-mplex = { version = "0.14.0-alpha.1", path = "../../muxers/mplex" }
 libp2p-secio = { version = "0.14.0-alpha.1", path = "../../protocols/secio" }
 libp2p-tcp = { version = "0.14.0-alpha.1", path = "../../transports/tcp" }
-rand = "0.6"
diff --git a/protocols/kad/Cargo.toml b/protocols/kad/Cargo.toml
index 24bc8839..27c99a6f 100644
--- a/protocols/kad/Cargo.toml
+++ b/protocols/kad/Cargo.toml
@@ -19,7 +19,6 @@ futures = "0.3.1"
 log = "0.4"
 libp2p-core = { version = "0.14.0-alpha.1", path = "../../core" }
 libp2p-swarm = { version = "0.4.0-alpha.1", path = "../../swarm" }
-multiaddr = { package = "parity-multiaddr", version = "0.7.0", path = "../../misc/multiaddr" }
 multihash = { package = "parity-multihash", version = "0.2.1", path = "../../misc/multihash" }
 protobuf = "=2.8.1" # note: see https://github.com/libp2p/rust-libp2p/issues/1363
 rand = "0.7.2"
@@ -32,7 +31,5 @@ void = "1.0"
 
 [dev-dependencies]
 libp2p-secio = { version = "0.14.0-alpha.1", path = "../secio" }
-libp2p-tcp = { version = "0.14.0-alpha.1", path = "../../transports/tcp" }
 libp2p-yamux = { version = "0.14.0-alpha.1", path = "../../muxers/yamux" }
 quickcheck = "0.9.0"
-rand = "0.7.2"
diff --git a/protocols/noise/Cargo.toml b/protocols/noise/Cargo.toml
index 84c862b9..68fdaed1 100644
--- a/protocols/noise/Cargo.toml
+++ b/protocols/noise/Cargo.toml
@@ -8,7 +8,6 @@ repository = "https://github.com/libp2p/rust-libp2p"
 edition = "2018"
 
 [dependencies]
-bytes = "0.5"
 curve25519-dalek = "1"
 futures = "0.3.1"
 lazy_static = "1.2"
@@ -25,5 +24,4 @@ zeroize = "1"
 env_logger = "0.7.1"
 libp2p-tcp = { version = "0.14.0-alpha.1", path = "../../transports/tcp" }
 quickcheck = "0.9.0"
-tokio = "0.1"
 sodiumoxide = "^0.2.5"
diff --git a/protocols/ping/Cargo.toml b/protocols/ping/Cargo.toml
index 026ba309..61eae9df 100644
--- a/protocols/ping/Cargo.toml
+++ b/protocols/ping/Cargo.toml
@@ -10,12 +10,10 @@ keywords = ["peer-to-peer", "libp2p", "networking"]
 categories = ["network-programming", "asynchronous"]
 
 [dependencies]
-bytes = "0.5"
 futures = "0.3.1"
 libp2p-core = { version = "0.14.0-alpha.1", path = "../../core" }
 libp2p-swarm = { version = "0.4.0-alpha.1", path = "../../swarm" }
 log = "0.4.1"
-multiaddr = { package = "parity-multiaddr", version = "0.7.0", path = "../../misc/multiaddr" }
 rand = "0.7.2"
 void = "1.0"
 wasm-timer = "0.2"
diff --git a/protocols/plaintext/Cargo.toml b/protocols/plaintext/Cargo.toml
index 6e4bba75..38d60407 100644
--- a/protocols/plaintext/Cargo.toml
+++ b/protocols/plaintext/Cargo.toml
@@ -24,4 +24,3 @@ void = "1.0.2"
 env_logger = "0.7.1"
 quickcheck = "0.9.0"
 rand = "0.7"
-futures-timer = "2.0"
diff --git a/protocols/secio/Cargo.toml b/protocols/secio/Cargo.toml
index 8e7cdfab..82222431 100644
--- a/protocols/secio/Cargo.toml
+++ b/protocols/secio/Cargo.toml
@@ -28,7 +28,6 @@ twofish = "0.2.0"
 
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
 ring = { version = "0.16.9", features = ["alloc"], default-features = false }
-untrusted = "0.7.0"
 
 [target.'cfg(target_arch = "wasm32")'.dependencies]
 js-sys = "0.3.10"
diff --git a/transports/tcp/Cargo.toml b/transports/tcp/Cargo.toml
index 77a7a887..a9e2a2aa 100644
--- a/transports/tcp/Cargo.toml
+++ b/transports/tcp/Cargo.toml
@@ -11,7 +11,6 @@ categories = ["network-programming", "asynchronous"]
 
 [dependencies]
 async-std = "1.0"
-bytes = "0.5"
 futures = "0.3.1"
 futures-timer = "2.0"
 get_if_addrs = "0.5.3"