diff --git a/adafruit_ble_berrymed_pulse_oximeter/adafruit_ble_transparent_uart.py b/adafruit_ble_berrymed_pulse_oximeter/adafruit_ble_transparent_uart.py
index f88c59f..f8e1903 100644
--- a/adafruit_ble_berrymed_pulse_oximeter/adafruit_ble_transparent_uart.py
+++ b/adafruit_ble_berrymed_pulse_oximeter/adafruit_ble_transparent_uart.py
@@ -17,9 +17,9 @@
 
 try:
     from typing import Optional
+    from circuitpython_typing import ReadableBuffer, WriteableBuffer
 except ImportError:
     pass
-from circuitpython_typing import ReadableBuffer, WriteableBuffer
 
 __version__ = "0.0.0+auto.0"
 __repo__ = (