diff --git a/adafruit_displayio_ssd1306.py b/adafruit_displayio_ssd1306.py
index b9ceeb7..8e663ae 100644
--- a/adafruit_displayio_ssd1306.py
+++ b/adafruit_displayio_ssd1306.py
@@ -105,7 +105,7 @@ def sleep(self):
         active prior to sleeping. MP can access (update) the built-in display RAM.
         """
         if self._is_awake:
-            self.bus.send(int(0xAE), "")  # 0xAE = display off, sleep mode
+            self.bus.send(0xAE, b"")  # 0xAE = display off, sleep mode
             self._is_awake = False
 
     def wake(self):
@@ -113,5 +113,5 @@ def wake(self):
         Wake display from sleep mode
         """
         if not self._is_awake:
-            self.bus.send(int(0xAF), "")  # 0xAF = display on
+            self.bus.send(0xAF, b"")  # 0xAF = display on
             self._is_awake = True