diff --git a/MisakaTranslator-WPF/SettingsPages/TranslatorPages/TranslatorGeneralSettingsPage.xaml b/MisakaTranslator-WPF/SettingsPages/TranslatorPages/TranslatorGeneralSettingsPage.xaml
index 476273e1..34e81af2 100644
--- a/MisakaTranslator-WPF/SettingsPages/TranslatorPages/TranslatorGeneralSettingsPage.xaml
+++ b/MisakaTranslator-WPF/SettingsPages/TranslatorPages/TranslatorGeneralSettingsPage.xaml
@@ -15,7 +15,7 @@
             <StackPanel Margin="20,36,0,0">
                 <hc:ComboBox Name="FirstTransCombox" Width="380" hc:InfoElement.TitleWidth="140" hc:InfoElement.TitlePlacement="Left" hc:InfoElement.Title="{StaticResource GeneralTransSettingsPage_FirstTranslator}" hc:Poptip.HitMode="None" hc:Poptip.IsOpen="{Binding IsMouseOver,RelativeSource={RelativeSource Self}}" hc:Poptip.Content="{StaticResource GeneralTransSettingsPage_TransSourceHint}" hc:Poptip.Placement="Top" SelectionChanged="FirstTransCombox_SelectionChanged" HorizontalAlignment="Left"/>
                 <hc:ComboBox Name="SecondTransCombox" Margin="0,10,0,0" Width="380" hc:InfoElement.TitleWidth="140" hc:InfoElement.TitlePlacement="Left" hc:InfoElement.Title="{StaticResource GeneralTransSettingsPage_SecondTranslator}" hc:Poptip.HitMode="None" hc:Poptip.IsOpen="{Binding IsMouseOver,RelativeSource={RelativeSource Self}}" hc:Poptip.Content="{StaticResource GeneralTransSettingsPage_TransSourceHint}" hc:Poptip.Placement="Top" SelectionChanged="SecondTransCombox_SelectionChanged" HorizontalAlignment="Left"/>
-                <hc:TextBox Margin="0,10,0,0" Width="480" hc:InfoElement.TitlePlacement="Left" hc:InfoElement.Title="{StaticResource GeneralTransSettingsPage_HttpProxy}" Name="HttpProxyBox" hc:InfoElement.ShowClearButton="True" TextChanged="HttpProxyBox_TextChanged" HorizontalAlignment="Left"/>
+                <hc:TextBox Margin="0,10,0,0" Width="480" hc:InfoElement.TitlePlacement="Left" hc:InfoElement.Title="{StaticResource GeneralTransSettingsPage_HttpProxy}" Name="HttpProxyBox" hc:InfoElement.ShowClearButton="True" LostFocus="HttpProxyBox_LostFocus" HorizontalAlignment="Left"/>
 
                 <hc:NumericUpDown Name="TransLimitBox" Minimum="1" Margin="0,10,0,0" Width="380" Style="{StaticResource NumericUpDownExtend}" hc:InfoElement.TitlePlacement="Left" hc:InfoElement.TitleWidth="140" hc:InfoElement.Title="{StaticResource GeneralTransSettingsPage_Translimit}"  HorizontalAlignment="Left"/>
 
diff --git a/MisakaTranslator-WPF/SettingsPages/TranslatorPages/TranslatorGeneralSettingsPage.xaml.cs b/MisakaTranslator-WPF/SettingsPages/TranslatorPages/TranslatorGeneralSettingsPage.xaml.cs
index 7d635c6d..3779041b 100644
--- a/MisakaTranslator-WPF/SettingsPages/TranslatorPages/TranslatorGeneralSettingsPage.xaml.cs
+++ b/MisakaTranslator-WPF/SettingsPages/TranslatorPages/TranslatorGeneralSettingsPage.xaml.cs
@@ -56,9 +56,12 @@ private void EachRowTransCheckBox_Click(object sender, RoutedEventArgs e)
             Common.appSettings.EachRowTrans = EachRowTransCheckBox.IsChecked ?? false;
         }
 
-        private void HttpProxyBox_TextChanged(object sender, TextChangedEventArgs e)
+        private void HttpProxyBox_LostFocus(object sender, RoutedEventArgs e)
         {
-            Common.appSettings.HttpProxy = HttpProxyBox.Text;
+            string text = HttpProxyBox.Text.Trim();
+            try { new Uri(text); }
+            catch (UriFormatException) { HandyControl.Controls.Growl.Error("Proxy url unsupported."); return; };
+            Common.appSettings.HttpProxy = text;
         }
 
         private void TransLimitBox_ValueChanged(object sender, HandyControl.Data.FunctionEventArgs<double> e)