diff --git a/proto/wippersnapper/uart/v1/uart.md b/proto/wippersnapper/uart/v1/uart.md
index 4171d97..6a19cb5 100644
--- a/proto/wippersnapper/uart/v1/uart.md
+++ b/proto/wippersnapper/uart/v1/uart.md
@@ -5,7 +5,7 @@ This file details the WipperSnapper messaging API for interfacing with a UART bu
 
 ## WipperSnapper Components
 
-The following WipperSnapper components utilize `pwm.proto`:
+The following WipperSnapper components utilize `uart.proto`:
 
 * PMS* Air Quality Sensors
 * Adafruit Universal GPS module using the MTK33x9 chipset
diff --git a/proto/wippersnapper/uart/v1/uart.proto b/proto/wippersnapper/uart/v1/uart.proto
index 2404572..bc6820e 100644
--- a/proto/wippersnapper/uart/v1/uart.proto
+++ b/proto/wippersnapper/uart/v1/uart.proto
@@ -12,8 +12,8 @@ import "wippersnapper/i2c/v1/i2c.proto";
 */
 message UARTBusData {
   int32 baudrate        = 1; /** The baudrate to use for UART communication (may be a common baud rate such as: 1200bps, 2400bps, 4800bps, 19200bps, 38400bps, 57600bps, or 115200bps). */
-  int32 pin_rx         = 2; /** The pin on which to receive UART stream data. */
-  int32 pin_tx         = 3; /** The pin on which to transmit UART stream data. */
+  string pin_rx         = 2[(nanopb).max_size = 6]; /** The pin on which to receive UART stream data. */
+  string pin_tx         = 3[(nanopb).max_size = 6]; /** The pin on which to transmit UART stream data. */
   bool is_invert        = 4; /** Inverts the UART signal on RX and TX pins. Defaults to False. */
 }
 
@@ -38,7 +38,7 @@ message UARTDeviceAttachResponse {
 
 /**
 * UARTDeviceEvent represents incoming data from a UART sensor.
-*/
+*
 message UARTDeviceEvent {
   string device_id = 1[(nanopb).max_size = 15];                    /** The unique identifier of the device to attach to the UART bus, from Adafruit_WipperSnapper_Components. */
   repeated wippersnapper.i2c.v1.SensorEvent sensor_event  = 2[(nanopb).max_count = 15]; /** A, optionally repeated, SensorEvent from a sensor. */