diff --git a/plugins/plansum/plansum.py b/plugins/plansum/plansum.py
index c24388b..70be886 100644
--- a/plugins/plansum/plansum.py
+++ b/plugins/plansum/plansum.py
@@ -5,7 +5,7 @@
     pass
 
 import wx
-from wx.lib.pubsub import pub
+from wx.lib.pubsub import Publisher as pub
 from wx.xrc import XmlResource
 import numpy as np
 import pydicom
@@ -14,7 +14,7 @@
     
 import unittest
 import os
-import threading, queue
+import threading, Queue
 
 
 def pluginProperties():
@@ -333,4 +333,4 @@ def testPlanSum(self):
                      
 if __name__ == '__main__':
     unittest.main()
-    
\ No newline at end of file
+