diff --git a/src/BreCalClient/EditShipcallControl.xaml b/src/BreCalClient/EditShipcallControl.xaml
index 006256f..9356652 100644
--- a/src/BreCalClient/EditShipcallControl.xaml
+++ b/src/BreCalClient/EditShipcallControl.xaml
@@ -85,7 +85,7 @@
         <Label x:Name="labelBSMDGranted" Grid.Row="7" Grid.Column="3" Grid.ColumnSpan="1" Content="{x:Static p:Resources.textBSMDGranted}" Visibility="Hidden" FontWeight="DemiBold" />
 
         <Label x:Name="labelShiftingCount" Grid.Row="6" Grid.Column="2" HorizontalAlignment="Right" Content="{x:Static p:Resources.textShiftingSequence}" />
-        <xctk:IntegerUpDown x:Name="integerUpDownShiftingCount" Grid.Row="6" Grid.Column="3" Margin="2" Minimum="0" Maximum="255" />
+        <xctk:IntegerUpDown x:Name="integerUpDownShiftingCount" Grid.Row="6" Grid.Column="3" Margin="2" Minimum="0" Maximum="127" />
 
         <StackPanel Grid.Row="8" Grid.Column="3" Orientation="Horizontal" HorizontalAlignment="Right">
             <Button Width= "80" Margin="2" Content="{x:Static p:Resources.textOK}" x:Name="buttonOK" Click="buttonOK_Click" IsEnabled="False" />