diff --git a/SourceCode/SharedResources/Panuon.WPF.UI.Internal/Converters/ProgressBarBorderClipConverter.cs b/SourceCode/SharedResources/Panuon.WPF.UI.Internal/Converters/ProgressBarBorderClipConverter.cs
index 39d7bf4f..14c7fe90 100644
--- a/SourceCode/SharedResources/Panuon.WPF.UI.Internal/Converters/ProgressBarBorderClipConverter.cs
+++ b/SourceCode/SharedResources/Panuon.WPF.UI.Internal/Converters/ProgressBarBorderClipConverter.cs
@@ -19,7 +19,6 @@ public override object Convert(object[] values, Type targetType, object paramete
             var direction = (ProgressDirection)values[5];
             var orientation = (Orientation)values[6];
 
-
             var percent = (value - min) / (max - min);
 
             var rect = new Rect();
@@ -28,10 +27,10 @@ public override object Convert(object[] values, Type targetType, object paramete
                 switch (direction)
                 {
                     case ProgressDirection.Normal:
-                        rect = new Rect(0, 0, width * percent, height);
+                        rect = new Rect(0, 0, Math.Max(0, width * percent), height);
                         break;
                     case ProgressDirection.Inverse:
-                        rect = new Rect(width * (1 - percent), 0, width * percent, height);
+                        rect = new Rect(width * (1 - percent), 0, Math.Max(0, width * percent), height);
                         break;
                 }
             }
@@ -40,10 +39,10 @@ public override object Convert(object[] values, Type targetType, object paramete
                 switch (direction)
                 {
                     case ProgressDirection.Normal:
-                        rect = new Rect(0, height * (1 - percent), width, height * percent);
+                        rect = new Rect(0, height * (1 - percent), width, Math.Max(0, height * percent));
                         break;
                     case ProgressDirection.Inverse:
-                        rect = new Rect(0, 0, width, height * percent);
+                        rect = new Rect(0, 0, width, Math.Max(0, height * percent));
                         break;
                 }
             }
diff --git a/SourceCode/SharedResources/Panuon.WPF.UI/Properties/AssemblyInfo.cs b/SourceCode/SharedResources/Panuon.WPF.UI/Properties/AssemblyInfo.cs
index bfee1742..a1bd57cc 100644
--- a/SourceCode/SharedResources/Panuon.WPF.UI/Properties/AssemblyInfo.cs
+++ b/SourceCode/SharedResources/Panuon.WPF.UI/Properties/AssemblyInfo.cs
@@ -25,5 +25,5 @@
     ResourceDictionaryLocation.SourceAssembly
 )]
 
-[assembly: AssemblyVersion("1.2.1.1")]
-[assembly: AssemblyFileVersion("1.2.1.1")]
\ No newline at end of file
+[assembly: AssemblyVersion("1.2.1.2")]
+[assembly: AssemblyFileVersion("1.2.1.2")]
\ No newline at end of file