diff --git a/CHANGELOG.md b/CHANGELOG.md
index dcb9afa..8119835 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -56,6 +56,7 @@ This release focuses on:
 - `UsbMidiEventPacket::from_midi` function, use `Message::into_packet` instead.
 - `CodeIndexNumber::find_from_message` function, use `Message::code_index_number` instead.
 - `From<CableNumber> for U4` implementation.
+- `From<CodeIndexNumber> for U4` implementation.
 
 ## [0.3.0] - 2024-05-27
 
diff --git a/src/message/mod.rs b/src/message/mod.rs
index 10c46dc..f0fae94 100644
--- a/src/message/mod.rs
+++ b/src/message/mod.rs
@@ -5,7 +5,6 @@ pub mod control_function;
 pub mod notes;
 pub mod raw;
 
-use crate::data::u4::U4;
 use crate::data::u7::U7;
 use crate::data::FromClamped;
 use crate::message::channel::Channel;
@@ -149,7 +148,7 @@ impl TryFrom<&UsbMidiEventPacket> for Message {
 impl Message {
     /// Create a packet from the message.
     pub fn into_packet(self, cable: CableNumber) -> UsbMidiEventPacket {
-        let cin = u8::from(U4::from(self.code_index_number()));
+        let cin = self.code_index_number() as u8;
 
         let mut raw = [0; 4];
         raw[0] = (cable as u8) << 4 | cin;
diff --git a/src/packet/code_index_number.rs b/src/packet/code_index_number.rs
index 6cb7fbf..39871de 100644
--- a/src/packet/code_index_number.rs
+++ b/src/packet/code_index_number.rs
@@ -1,6 +1,5 @@
 //! Enum representing the code index number of a packet.
 
-use crate::data::u4::U4;
 use crate::packet::MidiPacketParsingError;
 
 /// The Code Index Number(CIN) indicates the classification
@@ -85,12 +84,6 @@ impl TryFrom<u8> for CodeIndexNumber {
     }
 }
 
-impl From<CodeIndexNumber> for U4 {
-    fn from(value: CodeIndexNumber) -> U4 {
-        U4::from_overflowing_u8(value as u8)
-    }
-}
-
 impl CodeIndexNumber {
     /// Creates a new number from a MIDI event payload.
     pub fn try_from_payload(payload: &[u8]) -> Result<Self, MidiPacketParsingError> {