diff --git a/adafruit_st7789.py b/adafruit_st7789.py
index 3b34441..b403375 100755
--- a/adafruit_st7789.py
+++ b/adafruit_st7789.py
@@ -60,5 +60,5 @@
 class ST7789(displayio.Display):
     """ST7789 driver"""
 
-    def __init__(self, bus, **kwargs):
+    def __init__(self, bus, **kwargs) -> None:
         super().__init__(bus, _INIT_SEQUENCE, **kwargs)