diff --git a/openlp/core/ui/thememanager.py b/openlp/core/ui/thememanager.py
index 4b2de8500..190939ab9 100644
--- a/openlp/core/ui/thememanager.py
+++ b/openlp/core/ui/thememanager.py
@@ -664,25 +664,12 @@ class ThemeManager(QtGui.QWidget):
         """
         Called to update the themes' preview images.
         """
-        progressDialog = QtGui.QProgressDialog(self.mainwindow)
-        progressDialog.setWindowModality(QtCore.Qt.WindowModal)
-        progressDialog.setLabelText(
-            translate('OpenLP.ThemeManager', 'Starting update...',
-            'Shown when you update the theme images.'))
-        progressDialog.setCancelButton(None)
-        progressDialog.setRange(0, len(self.themelist))
-        progressDialog.setMinimumDuration(0)
-        progressDialog.forceShow()
-        Receiver.send_message(u'openlp_process_events')  
-        for index, theme in enumerate(self.themelist):
-            progressDialog.setValue(index)
-            progressDialog.setLabelText(unicode(translate('OpenLP.ThemeManager',
-                'Updating %s...',
-                'Shown when you update the theme images.')) % theme)
-            Receiver.send_message(u'openlp_process_events')
+        self.mainwindow.displayProgressBar(len(self.themelist))
+        for theme in self.themelist:
+            self.mainwindow.incrementProgressBar()
             self.generateAndSaveImage(
                 self.path, theme, self.getThemeData(theme))
-        progressDialog.setValue(len(self.themelist))
+        self.mainwindow.finishedProgressBar()
         self.loadThemes()
 
     def generateImage(self, themeData, forcePage=False):