diff --git a/Cargo.lock b/Cargo.lock
index 9a113b3..9d6f57f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,3 +1,5 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
 [[package]]
 name = "byteorder"
 version = "1.2.6"
@@ -24,7 +26,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "w5500"
-version = "0.1.5"
+version = "0.2.1"
 dependencies = [
  "byteorder 1.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "embedded-hal 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
diff --git a/Cargo.toml b/Cargo.toml
index 36675b5..3af94a9 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "w5500"
-version = "0.2.0"
+version = "0.2.1"
 authors = ["Michael Watzko <michael@watzko.de>"]
 repository = "https://github.com/kellerkindt/w5500.git"
 description = "W5500 IoT Controller implementation. Currently UDP sending and receiving is working. WIP"
diff --git a/src/lib.rs b/src/lib.rs
index b51ef3f..ce89dad 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -417,8 +417,8 @@ impl<E> Udp<E> for (&mut ActiveW5500<'_, '_, '_, E>, &UdpSocket) {
 
         {
             let local_port = w5500.read_u16(socket.at(SocketRegister::LocalPort))?;
-            let local_port = u16_to_be_bytes(local_port);
-            let host_port = u16_to_be_bytes(host_port);
+            let local_port = local_port.to_be_bytes();
+            let host_port = host_port.to_be_bytes();
 
             w5500.write_to(
                 socket.at(SocketRegister::LocalPort),
@@ -443,7 +443,7 @@ impl<E> Udp<E> for (&mut ActiveW5500<'_, '_, '_, E>, &UdpSocket) {
 
         let data_length = data.len() as u16;
         {
-            let data_length = u16_to_be_bytes(data_length);
+            let data_length = data_length.to_be_bytes();
 
             // TODO why write [0x00, 0x00] at TxReadPointer at all?
             // TODO Is TxWritePointer not sufficient enough?
@@ -487,12 +487,6 @@ impl<E> Udp<E> for (&mut ActiveW5500<'_, '_, '_, E>, &UdpSocket) {
 }
 
 
-fn u16_to_be_bytes(u16: u16) -> [u8; 2] {
-    let mut bytes = [0u8; 2];
-    BigEndian::write_u16(&mut bytes, u16);
-    bytes
-}
-
 #[repr(u8)]
 #[derive(Copy, Clone, PartialEq, Debug)]
 pub enum SocketRegister {