diff --git a/contact/message_handlers/rx_handler.py b/contact/message_handlers/rx_handler.py
index da6ea45..9147848 100644
--- a/contact/message_handlers/rx_handler.py
+++ b/contact/message_handlers/rx_handler.py
@@ -1,7 +1,7 @@
 import logging
 import time
 from datetime import datetime
-from typing import Any
+from typing import Any, Dict
 
 from contact.utilities.utils import refresh_node_list
 from contact.ui.contact_ui import (
@@ -21,7 +21,7 @@ import contact.ui.default_config as config
 import contact.globals as globals
 
 
-def on_receive(packet: dict[str, Any], interface: Any) -> None:
+def on_receive(packet: Dict[str, Any], interface: Any) -> None:
     """
     Handles an incoming packet from a Meshtastic interface.
 
diff --git a/contact/message_handlers/tx_handler.py b/contact/message_handlers/tx_handler.py
index 4044e53..dfc9bfd 100644
--- a/contact/message_handlers/tx_handler.py
+++ b/contact/message_handlers/tx_handler.py
@@ -1,5 +1,5 @@
 from datetime import datetime
-from typing import Any
+from typing import Any, Dict
 
 import google.protobuf.json_format
 from meshtastic import BROADCAST_NUM
@@ -15,12 +15,12 @@ from contact.utilities.db_handler import (
 import contact.ui.default_config as config
 import contact.globals as globals
 
-ack_naks: dict[str, dict[str, Any]] = {}  # requestId -> {channel, messageIndex, timestamp}
+ack_naks: Dict[str, Dict[str, Any]] = {}  # requestId -> {channel, messageIndex, timestamp}
 
 
 # Note "onAckNak" has special meaning to the API, thus the nonstandard naming convention
 # See https://github.com/meshtastic/python/blob/master/meshtastic/mesh_interface.py#L462
-def onAckNak(packet: dict[str, Any]) -> None:
+def onAckNak(packet: Dict[str, Any]) -> None:
     """
     Handles incoming ACK/NAK response packets.
     """
@@ -58,7 +58,7 @@ def onAckNak(packet: dict[str, Any]) -> None:
         draw_messages_window()
 
 
-def on_response_traceroute(packet: dict[str, Any]) -> None:
+def on_response_traceroute(packet: Dict[str, Any]) -> None:
     """
     Handle traceroute response packets and render the route visually in the UI.
     """
diff --git a/contact/ui/contact_ui.py b/contact/ui/contact_ui.py
index b3a82d4..31e5b9c 100644
--- a/contact/ui/contact_ui.py
+++ b/contact/ui/contact_ui.py
@@ -2,6 +2,7 @@ import curses
 import textwrap
 import logging
 import traceback
+from typing import Union
 
 from contact.utilities.utils import get_channels, get_readable_duration, get_time_ago, refresh_node_list
 from contact.settings import settings_menu
@@ -883,6 +884,6 @@ def draw_centered_text_field(win: curses.window, text: str, y_offset: int, color
     win.refresh()
 
 
-def draw_debug(value: str | int) -> None:
+def draw_debug(value: Union[str, int]) -> None:
     function_win.addstr(1, 1, f"debug: {value}    ")
     function_win.refresh()
diff --git a/contact/ui/control_ui.py b/contact/ui/control_ui.py
index af49398..4f7bec1 100644
--- a/contact/ui/control_ui.py
+++ b/contact/ui/control_ui.py
@@ -3,6 +3,7 @@ import curses
 import logging
 import os
 import sys
+from typing import List
 
 from contact.utilities.save_to_radio import save_changes
 from contact.utilities.config_io import config_export, config_import
@@ -130,7 +131,7 @@ def draw_help_window(
     menu_start_x: int,
     menu_height: int,
     max_help_lines: int,
-    transformed_path: list[str],
+    transformed_path: List[str],
     menu_state: MenuState,
 ) -> None:
 
diff --git a/contact/ui/default_config.py b/contact/ui/default_config.py
index 3a07105..a66af44 100644
--- a/contact/ui/default_config.py
+++ b/contact/ui/default_config.py
@@ -1,6 +1,7 @@
 import json
 import logging
 import os
+from typing import Dict
 
 # Get the parent directory of the script
 script_dir = os.path.dirname(os.path.abspath(__file__))
@@ -12,7 +13,7 @@ log_file_path = os.path.join(parent_dir, "client.log")
 db_file_path = os.path.join(parent_dir, "client.db")
 
 
-def format_json_single_line_arrays(data: dict[str, object], indent: int = 4) -> str:
+def format_json_single_line_arrays(data: Dict[str, object], indent: int = 4) -> str:
     """
     Formats JSON with arrays on a single line while keeping other elements properly indented.
     """
@@ -32,7 +33,7 @@ def format_json_single_line_arrays(data: dict[str, object], indent: int = 4) ->
 
 
 # Recursive function to check and update nested dictionaries
-def update_dict(default: dict[str, object], actual: dict[str, object]) -> bool:
+def update_dict(default: Dict[str, object], actual: Dict[str, object]) -> bool:
     updated = False
     for key, value in default.items():
         if key not in actual:
@@ -44,7 +45,7 @@ def update_dict(default: dict[str, object], actual: dict[str, object]) -> bool:
     return updated
 
 
-def initialize_config() -> dict[str, object]:
+def initialize_config() -> Dict[str, object]:
     COLOR_CONFIG_DARK = {
         "default": ["white", "black"],
         "background": [" ", "black"],
@@ -164,7 +165,7 @@ def initialize_config() -> dict[str, object]:
     return loaded_config
 
 
-def assign_config_variables(loaded_config: dict[str, object]) -> None:
+def assign_config_variables(loaded_config: Dict[str, object]) -> None:
     # Assign values to local variables
 
     global db_file_path, log_file_path, message_prefix, sent_message_prefix
diff --git a/contact/ui/menus.py b/contact/ui/menus.py
index 460d5b7..b2451c8 100644
--- a/contact/ui/menus.py
+++ b/contact/ui/menus.py
@@ -3,7 +3,7 @@ import logging
 import os
 from collections import OrderedDict
 
-from typing import Any
+from typing import Any, Union, Dict
 
 from google.protobuf.message import Message
 from meshtastic.protobuf import channel_pb2, config_pb2, module_config_pb2
@@ -21,8 +21,8 @@ def encode_if_bytes(value: Any) -> str:
 
 
 def extract_fields(
-    message_instance: Message, current_config: Message | dict[str, Any] | None = None
-) -> dict[str, Any]:
+    message_instance: Message, current_config: Union[Message, Dict[str, Any], None] = None
+) -> Dict[str, Any]:
     if isinstance(current_config, dict):  # Handle dictionaries
         return {key: (None, encode_if_bytes(current_config.get(key, "Not Set"))) for key in current_config}
 
@@ -63,7 +63,7 @@ def extract_fields(
     return menu
 
 
-def generate_menu_from_protobuf(interface: object) -> dict[str, Any]:
+def generate_menu_from_protobuf(interface: object) -> Dict[str, Any]:
     """
     Builds the full settings menu structure from the protobuf definitions.
     """
diff --git a/contact/ui/nav_utils.py b/contact/ui/nav_utils.py
index 11af85a..89deb97 100644
--- a/contact/ui/nav_utils.py
+++ b/contact/ui/nav_utils.py
@@ -2,11 +2,11 @@ import curses
 import re
 from contact.ui.colors import get_color
 from contact.utilities.control_utils import transform_menu_path
-from typing import Any
+from typing import Any, Optional, List, Dict
 
 # Aliases
 Segment = tuple[str, str, bool, bool]
-WrappedLine = list[Segment]
+WrappedLine = List[Segment]
 
 width = 80
 sensitive_settings = ["Reboot", "Reset Node DB", "Shutdown", "Factory Reset"]
@@ -14,7 +14,7 @@ save_option = "Save Changes"
 
 
 def move_highlight(
-    old_idx: int, options: list[str], menu_win: curses.window, menu_pad: curses.window, **kwargs: Any
+    old_idx: int, options: List[str], menu_win: curses.window, menu_pad: curses.window, **kwargs: Any
 ) -> None:
 
     show_save_option = None
@@ -125,7 +125,7 @@ def move_highlight(
 
 
 def draw_arrows(
-    win: object, visible_height: int, max_index: int, start_index: list[int], show_save_option: bool
+    win: object, visible_height: int, max_index: int, start_index: List[int], show_save_option: bool
 ) -> None:
 
     # vh = visible_height + (1 if show_save_option else 0)
@@ -145,9 +145,9 @@ def draw_arrows(
 
 def update_help_window(
     help_win: object,  # curses window or None
-    help_text: dict[str, str],
-    transformed_path: list[str],
-    selected_option: str | None,
+    help_text: Dict[str, str],
+    transformed_path: List[str],
+    selected_option: Optional[str],
     max_help_lines: int,
     width: int,
     help_y: int,
@@ -191,8 +191,8 @@ def update_help_window(
 
 
 def get_wrapped_help_text(
-    help_text: dict[str, str], transformed_path: list[str], selected_option: str | None, width: int, max_lines: int
-) -> list[WrappedLine]:
+    help_text: Dict[str, str], transformed_path: List[str], selected_option: Optional[str], width: int, max_lines: int
+) -> List[WrappedLine]:
     """Fetches and formats help text for display, ensuring it fits within the allowed lines."""
 
     full_help_key = ".".join(transformed_path + [selected_option]) if selected_option else None
@@ -210,7 +210,7 @@ def get_wrapped_help_text(
         r"\\033\[4m(.*?)\\033\[0m": ("settings_default", False, True),  # Underline
     }
 
-    def extract_ansi_segments(text: str) -> list[Segment]:
+    def extract_ansi_segments(text: str) -> List[Segment]:
         """Extracts and replaces ANSI color codes, ensuring spaces are preserved."""
         matches = []
         last_pos = 0
@@ -240,7 +240,7 @@ def get_wrapped_help_text(
 
         return matches
 
-    def wrap_ansi_text(segments: list[Segment], wrap_width: int) -> list[WrappedLine]:
+    def wrap_ansi_text(segments: List[Segment], wrap_width: int) -> List[WrappedLine]:
         """Wraps text while preserving ANSI formatting and spaces."""
         wrapped_lines = []
         line_buffer = []
@@ -283,7 +283,7 @@ def get_wrapped_help_text(
     return wrapped_help
 
 
-def wrap_text(text: str, wrap_width: int) -> list[str]:
+def wrap_text(text: str, wrap_width: int) -> List[str]:
     """Wraps text while preserving spaces and breaking long words."""
     words = re.findall(r"\S+|\s+", text)  # Capture words and spaces separately
     wrapped_lines = []
diff --git a/contact/ui/ui_state.py b/contact/ui/ui_state.py
index 3be5f20..0998011 100644
--- a/contact/ui/ui_state.py
+++ b/contact/ui/ui_state.py
@@ -1,11 +1,11 @@
-from typing import Any
+from typing import Any, Union, List, Dict
 
 
 class MenuState:
     def __init__(self):
-        self.menu_index: list[int] = []  # Row we left the previous menus
-        self.start_index: list[int] = [0]  # Row to start the menu if it doesn't all fit
+        self.menu_index: List[int] = []  # Row we left the previous menus
+        self.start_index: List[int] = [0]  # Row to start the menu if it doesn't all fit
         self.selected_index: int = 0  # Selected Row
-        self.current_menu: dict[str, Any] | list[Any] | str | int = {}  # Contents of the current menu
-        self.menu_path: list[str] = []  # Menu Path
+        self.current_menu: Union[Dict[str, Any], List[Any], str, int] = {}  # Contents of the current menu
+        self.menu_path: List[str] = []  # Menu Path
         self.show_save_option: bool = False  # Display 'Save'
diff --git a/contact/ui/user_config.py b/contact/ui/user_config.py
index b53b924..e4ac970 100644
--- a/contact/ui/user_config.py
+++ b/contact/ui/user_config.py
@@ -1,7 +1,7 @@
 import os
 import json
 import curses
-from typing import Any
+from typing import Any, List, Dict
 
 from contact.ui.colors import get_color, setup_colors, COLOR_MAP
 from contact.ui.default_config import format_json_single_line_arrays, loaded_config
@@ -14,7 +14,7 @@ max_help_lines = 6
 save_option = "Save Changes"
 
 
-def edit_color_pair(key: str, current_value: list[str]) -> list[str]:
+def edit_color_pair(key: str, current_value: List[str]) -> List[str]:
     """
     Allows the user to select a foreground and background color for a key.
     """
@@ -101,7 +101,7 @@ def edit_value(key: str, current_value: str) -> str:
     return user_input if user_input else current_value
 
 
-def display_menu(menu_state: Any) -> tuple[Any, Any, list[str]]:
+def display_menu(menu_state: Any) -> tuple[Any, Any, List[str]]:
     """
     Render the configuration menu with a Save button directly added to the window.
     """
@@ -319,7 +319,7 @@ def json_editor(stdscr: curses.window, menu_state: Any) -> None:
                 break
 
 
-def save_json(file_path: str, data: dict[str, Any]) -> None:
+def save_json(file_path: str, data: Dict[str, Any]) -> None:
     formatted_json = format_json_single_line_arrays(data)
     with open(file_path, "w", encoding="utf-8") as f:
         f.write(formatted_json)
diff --git a/contact/utilities/config_io.py b/contact/utilities/config_io.py
index a925d6f..393c0d3 100644
--- a/contact/utilities/config_io.py
+++ b/contact/utilities/config_io.py
@@ -1,5 +1,6 @@
 import yaml
 import logging
+from typing import List
 from google.protobuf.json_format import MessageToDict
 from meshtastic import mt_config
 from meshtastic.util import camel_to_snake, snake_to_camel, fromStr
@@ -20,9 +21,9 @@ def traverseConfig(config_root, config, interface_config) -> bool:
     return True
 
 
-def splitCompoundName(comp_name: str) -> list[str]:
+def splitCompoundName(comp_name: str) -> List[str]:
     """Split compound (dot separated) preference name into parts"""
-    name: list[str] = comp_name.split(".")
+    name: List[str] = comp_name.split(".")
     if len(name) < 2:
         name[0] = comp_name
         name.append(comp_name)
diff --git a/contact/utilities/control_utils.py b/contact/utilities/control_utils.py
index 7be9b81..1543b1f 100644
--- a/contact/utilities/control_utils.py
+++ b/contact/utilities/control_utils.py
@@ -1,12 +1,13 @@
+from typing import Optional, Tuple, Dict, List
 import re
 
 
-def parse_ini_file(ini_file_path: str) -> tuple[dict[str, str], dict[str, str]]:
+def parse_ini_file(ini_file_path: str) -> Tuple[Dict[str, str], Dict[str, str]]:
     """Parses an INI file and returns a mapping of keys to human-readable names and help text."""
 
-    field_mapping: dict[str, str] = {}
-    help_text: dict[str, str] = {}
-    current_section: str | None = None
+    field_mapping: Dict[str, str] = {}
+    help_text: Dict[str, str] = {}
+    current_section: Optional[str] = None
 
     with open(ini_file_path, "r", encoding="utf-8") as f:
         for line in f:
@@ -49,11 +50,11 @@ def parse_ini_file(ini_file_path: str) -> tuple[dict[str, str], dict[str, str]]:
     return field_mapping, help_text
 
 
-def transform_menu_path(menu_path: list[str]) -> list[str]:
+def transform_menu_path(menu_path: List[str]) -> List[str]:
     """Applies path replacements and normalizes entries in the menu path."""
     path_replacements = {"Radio Settings": "config", "Module Settings": "module"}
 
-    transformed_path: list[str] = []
+    transformed_path: List[str] = []
     for part in menu_path[1:]:  # Skip 'Main Menu'
         # Apply fixed replacements
         part = path_replacements.get(part, part)
diff --git a/contact/utilities/db_handler.py b/contact/utilities/db_handler.py
index d924a56..b6e7ba2 100644
--- a/contact/utilities/db_handler.py
+++ b/contact/utilities/db_handler.py
@@ -2,6 +2,7 @@ import sqlite3
 import time
 import logging
 from datetime import datetime
+from typing import Optional, Union, Dict
 
 from contact.utilities.utils import decimal_to_hex
 import contact.ui.default_config as config
@@ -15,7 +16,7 @@ def get_table_name(channel: str) -> str:
     return quoted_table_name
 
 
-def save_message_to_db(channel: str, user_id: str, message_text: str) -> int | None:
+def save_message_to_db(channel: str, user_id: str, message_text: str) -> Optional[int]:
     """Save messages to the database, ensuring the table exists."""
     try:
         quoted_table_name = get_table_name(channel)
@@ -178,7 +179,7 @@ def init_nodedb() -> None:
         logging.error(f"Unexpected error in init_nodedb: {e}")
 
 
-def maybe_store_nodeinfo_in_db(packet: dict[str, object]) -> None:
+def maybe_store_nodeinfo_in_db(packet: Dict[str, object]) -> None:
     """Save nodeinfo unless that record is already there, updating if necessary."""
     try:
         user_id = packet["from"]
@@ -198,14 +199,14 @@ def maybe_store_nodeinfo_in_db(packet: dict[str, object]) -> None:
 
 
 def update_node_info_in_db(
-    user_id: int | str,
-    long_name: str | None = None,
-    short_name: str | None = None,
-    hw_model: str | None = None,
-    is_licensed: str | int | None = None,
-    role: str | None = None,
-    public_key: str | None = None,
-    chat_archived: int | None = None,
+    user_id: Union[int, str],
+    long_name: Optional[str] = None,
+    short_name: Optional[str] = None,
+    hw_model: Optional[str] = None,
+    is_licensed: Optional[Union[str, int]] = None,
+    role: Optional[str] = None,
+    public_key: Optional[str] = None,
+    chat_archived: Optional[int] = None,
 ) -> None:
     """Update or insert node information into the database, preserving unchanged fields."""
     try:
diff --git a/contact/utilities/input_handlers.py b/contact/utilities/input_handlers.py
index 7e0d303..6a0497d 100644
--- a/contact/utilities/input_handlers.py
+++ b/contact/utilities/input_handlers.py
@@ -2,7 +2,7 @@ import base64
 import binascii
 import curses
 import ipaddress
-from typing import Any, Optional
+from typing import Any, Optional, List
 
 from contact.ui.colors import get_color
 from contact.ui.nav_utils import move_highlight, draw_arrows, wrap_text
@@ -98,7 +98,7 @@ def get_text_input(prompt: str) -> Optional[str]:
     return user_input
 
 
-def get_admin_key_input(current_value: list[bytes]) -> Optional[list[str]]:
+def get_admin_key_input(current_value: List[bytes]) -> Optional[List[str]]:
     def to_base64(byte_strings):
         """Convert byte values to Base64-encoded strings."""
         return [base64.b64encode(b).decode() for b in byte_strings]
@@ -183,7 +183,7 @@ def get_admin_key_input(current_value: list[bytes]) -> Optional[list[str]]:
                 pass  # Ignore invalid character inputs
 
 
-def get_repeated_input(current_value: list[str]) -> Optional[str]:
+def get_repeated_input(current_value: List[str]) -> Optional[str]:
     height = 9
     width = 80
     start_y = (curses.LINES - height) // 2
@@ -309,7 +309,7 @@ def get_fixed32_input(current_value: int) -> int:
                 pass  # Ignore invalid inputs
 
 
-def get_list_input(prompt: str, current_option: Optional[str], list_options: list[str]) -> Optional[str]:
+def get_list_input(prompt: str, current_option: Optional[str], list_options: List[str]) -> Optional[str]:
     """
     Displays a scrollable list of list_options for the user to choose from.
     """