diff --git a/README.md b/README.md
index 0933e45..d8659a9 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@ Lazylights is a Python API for controlling Lifx bulbs.
 To install,
 
 ```shell
-pip install git+https://github.com/mpapi/lazylights
+pip install git+https://github.com/mpapi/lazylights@2.0
 ```
 
 Then, in Python,
diff --git a/lazylights.py b/lazylights.py
index 9ca2e4b..4382d21 100644
--- a/lazylights.py
+++ b/lazylights.py
@@ -10,7 +10,7 @@
 
 _SOCKET_BUFFER_SIZE = 65536
 
-ALL_BULBS = '\x00' * 6
+ALL_BULBS = b'\x00' * 6
 
 LIFX_PORT = 56700
 ADDR_BROADCAST = ('255.255.255.255', LIFX_PORT)
@@ -163,7 +163,7 @@ def set_power(bulbs, is_on):
     otherwise.
     """
     _send(bulbs, REQ_SET_POWER_STATE, '2s',
-          '\xff\xff' if is_on else '\x00\x00')
+          b'\xff\xff' if is_on else b'\x00\x00')
 
 
 def set_state(bulbs, hue, saturation, brightness, kelvin, fade, raw=False):