diff --git a/server/app.py b/server/app.py
index 3607cb8..dcb51a3 100644
--- a/server/app.py
+++ b/server/app.py
@@ -43,6 +43,8 @@ db.autocommit(True)
 
 mqtt_client_id = "PiXelTubeMaster-"+wlan_mac_address
 
+TUBE_INDEX = None
+
 # Function to register a tube in the database
 def register_tube(mac_address):
     cur = db.cursor()
@@ -109,17 +111,16 @@ def connect_mqtt():
     return client
 
 def update_tube_index():
-    global tube_index
     while True:
         cur = db.cursor()
         cur.execute("SELECT mac_address, universe, dmx_address FROM tubes")
-        tube_index = cur.fetchall()
+        TUBE_INDEX = cur.fetchall()
         cur.close()
-        print("Updated index: "+str(tube_index))
+        print("Updated index: "+str(TUBE_INDEX))
         time.sleep(10)
 
 def mqtt_publisher():
-    global tube_index
+    global TUBE_INDEX
     # Create and start a thread for each universe
     mqtt_client = connect_mqtt()
     artnetBindIp = get_eth0_ip()
@@ -133,8 +134,8 @@ def mqtt_publisher():
                 #Checks to see if the current packet is for the specified DMX Universe
                 dmxPacket = artNetPacket.data
                 # Create MQTT topic based on the universe and channel
-                if tube_index is not None:
-                    for row in tube_index:
+                if TUBE_INDEX is not None:
+                    for row in TUBE_INDEX:
                         dmx_address = int(row[2])
                         if artNetPacket.universe == int(row[1]):
                             #Define RGB values per pixel
@@ -150,7 +151,6 @@ def mqtt_publisher():
             sys.exit()
 
 if __name__ == "__main__":
-    global tube_index
     tube_index_updater_thread = Process(target=update_tube_index)
     tube_index_updater_thread.start()
     flask_thread = Process(target=flask_api)