diff --git a/libs/Kernel.py b/libs/Kernel.py
index 2d1fe5b..ccf0f42 100644
--- a/libs/Kernel.py
+++ b/libs/Kernel.py
@@ -1,4 +1,4 @@
-#!/bin/python
+#!/usr/bin/python
 
 import datetime
 from datetime import datetime
diff --git a/libs/functions.py b/libs/functions.py
index 55b73a2..ec072d7 100644
--- a/libs/functions.py
+++ b/libs/functions.py
@@ -1,4 +1,4 @@
-#!/bin/python
+#!/usr/bin/python
 
 import os
 from os import makedirs
diff --git a/snigdhaos-kernel-switcher.py b/snigdhaos-kernel-switcher.py
index ca9cc92..c28ff2d 100644
--- a/snigdhaos-kernel-switcher.py
+++ b/snigdhaos-kernel-switcher.py
@@ -1,7 +1,23 @@
-#!/bin/python
+#!/usr/bin/python
 import os
-
+import libs.functions as fn
 import gi
-gi.require_version("Gtk", "3.0")
+gi.require_version("Gtk", "4.0")
 from gi.repository import Gtk, Gio, GLib, Gdk
 
+base_dir = fn.os.path.dirname(fn.os.path.realpath(__file__))
+
+app_name = "Snigdha OS Kernel Switcher"
+app_version = "${app_version}"
+app_name_dir = "snigdhaos-kernel-switcher"
+app_id = "org.snigdhaos.kernelswitcher"
+lock_file = "/tmp/.sks.lock"
+progress_lock_file = "/tmp/.sks-progress.lock"
+pid_file ="/tmp/.sks.pid" 
+
+class Main(Gtk.Application):
+    def __init__(self):
+        super().__init__(application_id=app_id, flags=Gio.ApplicationFlags.FLAGS_NONE)
+    
+    def do_activate(self):
+        default_context = GLib.
\ No newline at end of file