diff --git a/adafruit_pm25.py b/adafruit_pm25.py
index ea22c6a..967c14b 100644
--- a/adafruit_pm25.py
+++ b/adafruit_pm25.py
@@ -46,7 +46,6 @@
 # imports
 import time
 import struct
-from adafruit_bus_device.i2c_device import I2CDevice
 from digitalio import Direction
 
 __version__ = "0.0.0-auto.0"
@@ -125,6 +124,10 @@ class PM25_I2C(PM25):
     """
 
     def __init__(self, i2c_bus, reset_pin=None, address=0x12):
+        # fmt: off
+        from adafruit_bus_device.i2c_device import I2CDevice # pylint: disable=import-outside-toplevel
+        # fmt: on
+
         if reset_pin:
             # Reset device
             reset_pin.direction = Direction.OUTPUT