diff --git a/README.md b/README.md
index 19d25ae..b03bcf5 100644
--- a/README.md
+++ b/README.md
@@ -8,8 +8,8 @@ Python library for TSL2561
 Requirements
 ------------
   - python 2.7.x
-  - Adafruit I2C library (https://github.com/adafruit/Adafruit-Raspberry-Pi-Python-Code/tree/master/Adafruit_I2C)
-  - python smbus
+  - Adafruit GPIO library (https://github.com/adafruit/Adafruit_Python_GPIO)
+  - Adafruit PureIO library (https://github.com/adafruit/Adafruit_Python_PureIO)
 
 Example
 ------------
@@ -27,7 +27,7 @@ License
 Copyright (c) 2015 Kevin Townsend for Adafruit Industries.
 All rights reserved.
 
-Copyright (c) 2015, Georges Toth
+Copyright (c) 2016, Georges Toth
 All rights reserved.
 
 
diff --git a/setup.py b/setup.py
index 0cae85e..59ca9a6 100755
--- a/setup.py
+++ b/setup.py
@@ -4,7 +4,7 @@
 import sys
 import os
 
-VERSION = (2, 0)
+VERSION = (2, 1)
 __version__ = VERSION
 __versionstr__ = '.'.join(map(str, VERSION))
 
diff --git a/tsl2561/tsl2561.py b/tsl2561/tsl2561.py
index cb3b2eb..ccf2512 100644
--- a/tsl2561/tsl2561.py
+++ b/tsl2561/tsl2561.py
@@ -14,15 +14,16 @@
 
 from __future__ import absolute_import
 import time
-from Adafruit_I2C import Adafruit_I2C
+from Adafruit_GPIO import I2C
 from .constants import *  # pylint: disable=unused-wildcard-import
 
 __author__ = 'Georges Toth <georges@trypill.org>'
 __credits__ = ['K.Townsend (Adafruit Industries)']
 __license__ = 'BSD'
-__version__ = 'v2.0'
+__version__ = 'v2.1'
 
 '''HISTORY
+v2.1 - Minor adaptations required by latest Adafruit pyton libraries
 v2.0 - Rewrote driver for Adafruit_Sensor and Auto-Gain support, and
        added lux clipping check (returns 0 lux on sensor saturation)
 v1.0 - First release (previously TSL2561)
@@ -31,7 +32,7 @@
 
 class TSL2561(object):
     '''Driver for the TSL2561 digital luminosity (light) sensors.'''
-    def __init__(self, address=None,
+    def __init__(self, address=None, busnum=None,
                  integration_time=TSL2561_DELAY_INTTIME_402MS,
                  gain=TSL2561_GAIN_1X, autogain=False, debug=False):
         if address is not None:
@@ -39,7 +40,7 @@ def __init__(self, address=None,
         else:
             self.address = TSL2561_ADDR_FLOAT
 
-        self.i2c = Adafruit_I2C(self.address)
+        self.i2c = I2C.get_i2c_device(self.address, busnum=busnum)
 
         self.debug = debug
         self.integration_time = integration_time