diff --git a/homeassistant/components/modbus.py b/homeassistant/components/modbus.py
index 0b30a7b5181..0bd3b23c2f9 100644
--- a/homeassistant/components/modbus.py
+++ b/homeassistant/components/modbus.py
@@ -38,7 +38,8 @@ from homeassistant.const import (EVENT_HOMEASSISTANT_START,
 DOMAIN = "modbus"
 
 DEPENDENCIES = []
-REQUIREMENTS = ['pymodbus>=1.2.0']
+REQUIREMENTS = ['https://github.com/bashwork/pymodbus/archive/python3.zip'
+                '#pymodbus>=1.2.0']
 
 # Type of network
 MEDIUM = "type"
diff --git a/requirements.txt b/requirements.txt
index 1d4bb5e82b5..445a2fe3657 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -108,5 +108,5 @@ RPi.GPIO >=0.5.11
 paho-mqtt>=1.1
 
 # PyModbus (modbus)
-pymodbus>=1.2.0
+https://github.com/bashwork/pymodbus/archive/python3.zip#pymodbus>=1.2.0