diff --git a/encryption.py b/encryption.py
index 9fa5cc6..52514fd 100644
--- a/encryption.py
+++ b/encryption.py
@@ -6,7 +6,6 @@
 
 from utils import generate_hash
 
-
 def decrypt_packet(mp, key):
     """Decrypt the encrypted message payload and return the decoded data."""
     try:
@@ -52,4 +51,4 @@ def encrypt_packet(channel, key, mp, encoded_message):
     
     except Exception as e:
         logging.error(f"Failed to encrypt: {e}")
-        return None
+        return None
\ No newline at end of file
diff --git a/load_config.py b/load_config.py
index 8a5e357..255fb21 100644
--- a/load_config.py
+++ b/load_config.py
@@ -25,4 +25,4 @@
 HOP_MODIFIER = config['hop_modifier']
 
 # Get the full default key
-EXPANDED_KEY = "1PG7OiApB1nwvP+rz05pAQ==" if KEY == "AQ==" else KEY
+KEY = "1PG7OiApB1nwvP+rz05pAQ==" if KEY == "AQ==" else KEY
\ No newline at end of file
diff --git a/logger.py b/logger.py
index 53edf26..fce89bf 100644
--- a/logger.py
+++ b/logger.py
@@ -1,6 +1,5 @@
 import logging
 
-# Enable logging
 logging.basicConfig(
     level=logging.INFO,
     format='%(asctime)s - %(levelname)s %(message)s',
@@ -27,4 +26,4 @@ def log_skipped_message(from_topic, portnum, action) -> None:
         f"Portnum    : {portnum}\n"
         f"Action     : {action}\n"
         f"{DIVIDER}"
-    )
+    )
\ No newline at end of file
diff --git a/main.py b/main.py
index db91e03..0ff8e8b 100644
--- a/main.py
+++ b/main.py
@@ -1,4 +1,3 @@
-
 import logging
 import sys
 
diff --git a/message_handler.py b/message_handler.py
index 4b15aab..c6d8c64 100644
--- a/message_handler.py
+++ b/message_handler.py
@@ -38,7 +38,7 @@ def on_message(client, userdata, msg) -> None:
     
     # Decrypt the payload if necessary
     if original_mp.HasField("encrypted") and not original_mp.HasField("decoded"):
-        decoded_data = decrypt_packet(original_mp, load_config.EXPANDED_KEY)
+        decoded_data = decrypt_packet(original_mp, load_config.KEY)
         if decoded_data is None:  # Check if decryption failed
             logging.error("Decryption failed; skipping message")
             return  # Skip processing this message if decryption failed
@@ -81,16 +81,16 @@ def on_message(client, userdata, msg) -> None:
             forward_to_preset = target_topic.split("/")[-1]
             target_topic =f"{target_topic}/{gateway_node_id}"
     
-            new_channel = generate_hash(forward_to_preset, load_config.EXPANDED_KEY)
+            new_channel = generate_hash(forward_to_preset, load_config.KEY)
             modified_mp.channel = new_channel
             original_channel = msg.topic
             original_channel = original_channel.split("/")[-2]
-            original_channel = generate_hash(original_channel, load_config.EXPANDED_KEY)
+            original_channel = generate_hash(original_channel, load_config.KEY)
 
-            if load_config.EXPANDED_KEY == "":
+            if load_config.KEY == "":
                 modified_mp.decoded.CopyFrom(original_mp.decoded)
             else:
-                modified_mp.encrypted = encrypt_packet(forward_to_preset, load_config.EXPANDED_KEY, modified_mp, original_mp.decoded)
+                modified_mp.encrypted = encrypt_packet(forward_to_preset, load_config.KEY, modified_mp, original_mp.decoded)
 
 
             # Package the modified packet for publishing
diff --git a/mqtt.py b/mqtt.py
index 02a1403..7432921 100644
--- a/mqtt.py
+++ b/mqtt.py
@@ -12,7 +12,7 @@ def on_connect(client, userdata, flags, reason_code, properties=None):
         logging.error(f"Failed to connect with reason code {reason_code}")
 
 def create_mqtt_client():
-    client = mqtt.Client()
+    client = mqtt.Client(mqtt.CallbackAPIVersion.VERSION2)
     client.username_pw_set(load_config.USER, load_config.PASSWORD)
     client.on_connect = on_connect
     return client
\ No newline at end of file