diff --git a/Cargo.lock b/Cargo.lock
index f5fc14cad..22f04126d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1347,7 +1347,6 @@ dependencies = [
 name = "ethkey"
 version = "0.3.0"
 dependencies = [
- "byteorder 1.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "edit-distance 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "eth-secp256k1 0.5.7 (git+https://github.com/paritytech/rust-secp256k1)",
  "ethereum-types 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
diff --git a/accounts/ethkey/Cargo.toml b/accounts/ethkey/Cargo.toml
index ebb17d21d..a66a74de0 100644
--- a/accounts/ethkey/Cargo.toml
+++ b/accounts/ethkey/Cargo.toml
@@ -5,7 +5,6 @@ version = "0.3.0"
 authors = ["Parity Technologies <admin@parity.io>"]
 
 [dependencies]
-byteorder = "1.0"
 edit-distance = "2.0"
 parity-crypto = "0.4.0"
 eth-secp256k1 = { git = "https://github.com/paritytech/rust-secp256k1" }
diff --git a/accounts/ethkey/src/extended.rs b/accounts/ethkey/src/extended.rs
index 64039130b..005f4ba66 100644
--- a/accounts/ethkey/src/extended.rs
+++ b/accounts/ethkey/src/extended.rs
@@ -35,9 +35,8 @@ impl Label for u32 {
 	fn len() -> usize { 4 }
 
 	fn store(&self, target: &mut [u8]) {
-		use byteorder::{BigEndian, ByteOrder};
-
-		BigEndian::write_u32(&mut target[0..4], *self);
+		let bytes = self.to_be_bytes();
+		target[0..4].copy_from_slice(&bytes);
 	}
 }
 
diff --git a/accounts/ethkey/src/lib.rs b/accounts/ethkey/src/lib.rs
index f22c77e3c..2312f2bcd 100644
--- a/accounts/ethkey/src/lib.rs
+++ b/accounts/ethkey/src/lib.rs
@@ -16,7 +16,6 @@
 
 // #![warn(missing_docs)]
 
-extern crate byteorder;
 extern crate edit_distance;
 extern crate parity_crypto;
 extern crate ethereum_types;