diff --git a/source/app.py b/source/app.py
index b5e002b..9a1d374 100755
--- a/source/app.py
+++ b/source/app.py
@@ -2,6 +2,7 @@
 
 import argparse
 import logging
+import os
 import shlex
 import subprocess
 from pathlib import Path
@@ -26,6 +27,10 @@ def _call(args):
     return result
 
 
+def _join(*paths):
+    return os.path.join(*paths)
+
+
 def _actualizar():
     confirm = input('¿Estas seguro de actualizar (escribe si) ? ')
     if confirm != 'si':