diff --git a/requirements.txt b/requirements.txt
index 35ac707..082b7f3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,2 @@
 pypubsub
-requests
-git+https://github.com/accessibleapps/platform_utils
\ No newline at end of file
+requests
\ No newline at end of file
diff --git a/updater/core.py b/updater/core.py
index db7a464..2c00253 100644
--- a/updater/core.py
+++ b/updater/core.py
@@ -11,9 +11,8 @@ import zipfile
 import logging
 import requests
 from pubsub import pub # type: ignore
-from platform_utils import paths # type: ignore
 from typing import Optional, Dict, Tuple, Union, Any
-
+from . import paths
 log = logging.getLogger("updater.core")
 
 class UpdaterCore(object):
diff --git a/updater/paths.py b/updater/paths.py
new file mode 100644
index 0000000..e34b4cc
--- /dev/null
+++ b/updater/paths.py
@@ -0,0 +1,60 @@
+""" Provide some system paths for multiple platforms.
+
+This module has been taken and modified from https://github.com/accessibleapps/platform_utils and has been used to provide some convenient methods to retrieve system paths.
+"""
+import platform
+import os
+import sys
+
+plat: str = platform.system()
+is_windows: bool = plat == "Windows"
+is_mac: bool = plat == "Darwin"
+is_linux: bool = plat == "Linux"
+
+# ToDo: Return correct values for nuitka build executables, as they do not use sys.frozen.
+def is_frozen() -> bool:
+    """ Checks wheter the updater package is inside a frozen application.
+
+    :rtype: bool
+"""
+    return hasattr(sys, "frozen")
+
+def get_executable() -> str:
+    """Returns the full executable path/name if frozen, or the full path/name of the main module if not.
+
+    :rtype: str
+    """
+    if is_frozen():
+        if not is_mac:
+            return sys.executable
+        # On Mac, sys.executable points to python. We want the full path to the exe we ran.
+        exedir = os.path.abspath(os.path.dirname(sys.executable))
+        items = os.listdir(exedir)
+        if "python" in items:
+            items.remove("python")
+        return os.path.join(exedir, items[0])
+    # Not frozen
+    try:
+        import __main__
+        return os.path.abspath(__main__.__file__)
+    except AttributeError:
+        return sys.argv[0]
+
+def executable_directory() -> str:
+    """Always determine the directory of the executable, even when run with py2exe or otherwise frozen.
+
+    :rtype: str
+    """
+    executable = get_executable()
+    path = os.path.abspath(os.path.dirname(executable))
+    return path
+
+def app_path() -> str:
+    """ Returns application directory.
+
+    :rtype: str
+    """
+    path = executable_directory()
+    if is_frozen() and is_mac:
+        path = os.path.abspath(os.path.join(path, "..", ".."))
+    return path
\ No newline at end of file
diff --git a/updater/wxupdater.py b/updater/wxupdater.py
index c179f66..a7f4378 100644
--- a/updater/wxupdater.py
+++ b/updater/wxupdater.py
@@ -38,8 +38,7 @@ import logging
 from typing import Optional, Any, cast
 from pubsub import pub # type: ignore
 from pubsub.core.topicexc import TopicNameError # type: ignore
-from platform_utils import paths # type: ignore
-from . import core, utils
+from . import core, utils, paths
 
 log = logging.getLogger("updater.WXUpdater")
 
@@ -167,7 +166,7 @@ class WXUpdater(core.UpdaterCore):
         update_path = os.path.join(base_path, 'update')
         extraction_path = self.extract_update(downloaded, destination=update_path)
         bootstrap_exe = self.move_bootstrap(extraction_path)
-        source_path = os.path.join(paths.app_path(), "sandbox")
+        source_path = paths.app_path()
         self.on_update_almost_complete()
         self.execute_bootstrap(bootstrap_exe, source_path)