diff --git a/openlp/core/ui/generaltab.py b/openlp/core/ui/generaltab.py
index 49497a10e..7fe7beaca 100644
--- a/openlp/core/ui/generaltab.py
+++ b/openlp/core/ui/generaltab.py
@@ -93,14 +93,14 @@ class GeneralTab(SettingsTab):
         self.monitor_layout.addWidget(self.custom_width_label, 3, 3)
         self.custom_width_value_edit = QtGui.QSpinBox(self.monitor_group_box)
         self.custom_width_value_edit.setObjectName(u'custom_width_value_edit')
-        self.custom_width_value_edit.setMaximum(9999)
+        self.custom_width_value_edit.setRange(1, 9999)
         self.monitor_layout.addWidget(self.custom_width_value_edit, 4, 3)
         self.custom_height_label = QtGui.QLabel(self.monitor_group_box)
         self.custom_height_label.setObjectName(u'custom_height_label')
         self.monitor_layout.addWidget(self.custom_height_label, 3, 4)
         self.custom_height_value_edit = QtGui.QSpinBox(self.monitor_group_box)
         self.custom_height_value_edit.setObjectName(u'custom_height_value_edit')
-        self.custom_height_value_edit.setMaximum(9999)
+        self.custom_height_value_edit.setRange(1, 9999)
         self.monitor_layout.addWidget(self.custom_height_value_edit, 4, 4)
         self.display_on_monitor_check = QtGui.QCheckBox(self.monitor_group_box)
         self.display_on_monitor_check.setObjectName(u'monitor_combo_box')