diff --git a/tuhi/gui/config.py b/tuhi/gui/config.py
index 158bfdc..2578e85 100644
--- a/tuhi/gui/config.py
+++ b/tuhi/gui/config.py
@@ -69,7 +69,7 @@ class Config(GObject.Object):
         self.config[section][key] = value
         self._write()
 
-    @GObject.property
+    @GObject.Property
     def orientation(self):
         try:
             return self.config['Device']['Orientation']
@@ -81,7 +81,7 @@ class Config(GObject.Object):
         assert(orientation in ['landscape', 'portrait'])
         self._add_key('Device', 'Orientation', orientation)
 
-    @GObject.property
+    @GObject.Property
     def drawings(self):
         return self._drawings
 
diff --git a/tuhi/gui/drawingperspective.py b/tuhi/gui/drawingperspective.py
index 95708b8..ec47d36 100644
--- a/tuhi/gui/drawingperspective.py
+++ b/tuhi/gui/drawingperspective.py
@@ -55,7 +55,7 @@ class Flowbox(Gtk.Box):
                 self.flowbox_drawings.remove(child)
         self.flowbox_drawings.foreach(delete_matching_child, drawing)
 
-    @GObject.property
+    @GObject.Property
     def is_empty(self):
         return not self.flowbox_drawings.get_children()
 
diff --git a/tuhi/wacom.py b/tuhi/wacom.py
index e432191..ef3bcc6 100644
--- a/tuhi/wacom.py
+++ b/tuhi/wacom.py
@@ -479,7 +479,7 @@ class WacomProtocolBase(WacomProtocolLowLevelComm):
         device.connect_gatt_value(WACOM_OFFLINE_CHRC_PEN_DATA_UUID,
                                   self._on_pen_data_received)
 
-    @GObject.property
+    @GObject.Property
     def dimensions(self):
         return (self.width, self.height)