diff --git a/sweecrypt-gtk.py b/sweecrypt-gtk.py
index 08180cf..511db4c 100644
--- a/sweecrypt-gtk.py
+++ b/sweecrypt-gtk.py
@@ -1,3 +1,5 @@
+import gi
+gi.require_version("Gtk", "3.0")
 from gi.repository import Gtk, GdkPixbuf, Gdk
 import os, sys
 from sweecrypt import encrypt, decrypt