diff -Naur old/zeitgeist-explorer new/zeitgeist-explorer
--- old/zeitgeist-explorer	2021-06-13 19:22:42.644680071 +0200
+++ new/zeitgeist-explorer	2021-06-13 19:23:20.140742704 +0200
@@ -19,6 +19,9 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.";
 #
 
+import gi
+
+gi.require_version("Gtk", "3.0")
 from gi.repository import Gtk
 import gettext
 
