diff --git a/gateway/bc-gateway.py b/gateway/bc-gateway.py
index 779280d..a356d62 100755
--- a/gateway/bc-gateway.py
+++ b/gateway/bc-gateway.py
@@ -5,7 +5,7 @@
 import time
 import logging
 import argparse
-import json
+import simplejson as json
 import platform
 import decimal
 import yaml
@@ -30,21 +30,6 @@
 LOG_FORMAT = '%(asctime)s %(levelname)s: %(message)s'
 
 
-class FakeFloat(float):
-
-    def __init__(self, value):
-        self._value = value
-
-    def __repr__(self):
-        return str(self._value)
-
-
-def decimal_default(obj):
-    if isinstance(obj, decimal.Decimal):
-        return FakeFloat(obj)
-    raise TypeError
-
-
 def mqtt_on_connect(client, userdata, flags, rc):
     logging.info('Connected to MQTT broker with code %s', rc)
     client.subscribe(userdata['base_topic'] + '+/+/+/+/+')
@@ -88,7 +73,7 @@ def run():
             except Exception:
                 logging.error('Invalid JSON message received from serial port: %s', line)
             try:
-                mqttc.publish(base_topic + talk[0], json.dumps(talk[1], default=decimal_default), qos=1)
+                mqttc.publish(base_topic + talk[0], json.dumps(talk[1], use_decimal=True), qos=1)
             except Exception:
                 logging.error('Failed to publish MQTT message: %s', line)
 
diff --git a/gateway/requirements.txt b/gateway/requirements.txt
index 5389839..22bbf60 100644
--- a/gateway/requirements.txt
+++ b/gateway/requirements.txt
@@ -1,3 +1,4 @@
-paho-mqtt>=1.0  # deb:python3-paho-mqtt>=1.0
-pyserial>=2.6   # deb:python3-serial>=2.6
-PyYAML>=3.12    # deb:python3-yaml>=3.12
\ No newline at end of file
+paho-mqtt>=1.0     # deb:python3-paho-mqtt>=1.0
+pyserial>=2.6      # deb:python3-serial>=2.6
+PyYAML>=3.12       # deb:python3-yaml>=3.12
+simplejson>=3.10.0 # deb:python3-simplejson>=3.10.0
\ No newline at end of file