diff --git a/src/Semi.Avalonia/Controls/CalendarDatePicker.axaml b/src/Semi.Avalonia/Controls/CalendarDatePicker.axaml
index 22bb704..3bc7a0a 100644
--- a/src/Semi.Avalonia/Controls/CalendarDatePicker.axaml
+++ b/src/Semi.Avalonia/Controls/CalendarDatePicker.axaml
@@ -111,7 +111,7 @@
                                         DisplayDateStart="{TemplateBinding DisplayDateStart}"
                                         FirstDayOfWeek="{TemplateBinding FirstDayOfWeek}"
                                         IsTodayHighlighted="{TemplateBinding IsTodayHighlighted}"
-                                        SelectedDate="{TemplateBinding SelectedDate, Mode=TwoWay}" />
+                                        SelectedDate="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=SelectedDate, Mode=TwoWay}" />
                                 </Border>
                             </Popup>
                         </Grid>