diff --git a/Source/Monitorian.Core/Properties/AssemblyInfo.cs b/Source/Monitorian.Core/Properties/AssemblyInfo.cs
index 884bd036..7a865024 100644
--- a/Source/Monitorian.Core/Properties/AssemblyInfo.cs
+++ b/Source/Monitorian.Core/Properties/AssemblyInfo.cs
@@ -33,8 +33,8 @@
 // You can specify all the values or you can default the Build and Revision Numbers
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("2.7.4.0")]
-[assembly: AssemblyFileVersion("2.7.4.0")]
+[assembly: AssemblyVersion("2.7.5.0")]
+[assembly: AssemblyFileVersion("2.7.5.0")]
 [assembly: NeutralResourcesLanguage("en-US")]
 
 // For unit test
diff --git a/Source/Monitorian.Core/Views/Controls/Sliders/EnhancedSlider.cs b/Source/Monitorian.Core/Views/Controls/Sliders/EnhancedSlider.cs
index 612947c0..7298334b 100644
--- a/Source/Monitorian.Core/Views/Controls/Sliders/EnhancedSlider.cs
+++ b/Source/Monitorian.Core/Views/Controls/Sliders/EnhancedSlider.cs
@@ -164,7 +164,7 @@ protected virtual bool SetValueStartDrag(
 
 			var originTrackPoint = getPosition(_track);
 			var newValue = _track.ValueFromPoint(originTrackPoint);
-			if (UpdateValue(newValue))
+			if (!UpdateValue(newValue))
 				return false;
 
 			// Reproduce Thumb.OnMouseLeftButtonDown method.
diff --git a/Source/Monitorian/Properties/AssemblyInfo.cs b/Source/Monitorian/Properties/AssemblyInfo.cs
index 64d485a6..9de812cc 100644
--- a/Source/Monitorian/Properties/AssemblyInfo.cs
+++ b/Source/Monitorian/Properties/AssemblyInfo.cs
@@ -51,7 +51,7 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("2.7.4.0")]
-[assembly: AssemblyFileVersion("2.7.4.0")]
+[assembly: AssemblyVersion("2.7.5.0")]
+[assembly: AssemblyFileVersion("2.7.5.0")]
 [assembly: Guid("a4cc5362-9b08-465b-ad64-5cfabc72a4c7")]
 [assembly: NeutralResourcesLanguage("en-US")]