diff --git a/jobviewer.py b/jobviewer.py
index bf3e7a7..d4cf99c 100644
--- a/jobviewer.py
+++ b/jobviewer.py
@@ -24,6 +24,8 @@ import cups
 import dbus
 import dbus.glib
 import dbus.service
+import gi
+gi.require_version('Notify', '0.7')
 from gi.repository import Notify
 import gettext
 from gi.repository import GLib
@@ -51,6 +53,7 @@ import errordialogs
 cups.require("1.9.47")
 
 try:
+    gi.require_version('GnomeKeyring', '1.0')
     from gi.repository import GnomeKeyring
     USE_KEYRING=True
 except ImportError:
diff --git a/system-config-printer.py b/system-config-printer.py
index cdb6140..9ee6d88 100755
--- a/system-config-printer.py
+++ b/system-config-printer.py
@@ -28,8 +28,10 @@ import sys, os, time, re
 import thread
 import dbus
 import gi
+gi.require_version('GdkPixbuf', '2.0')
 from gi.repository import GdkPixbuf
 try:
+    gi.require_version('Gdk', '3.0')
     from gi.repository import Gdk
     gi.require_version('Gtk', '3.0')
     from gi.repository import Gtk