diff --git a/Code/Be/Faster.Zheng.Winin/src/Faster.Zheng.Winin.Application.Contracts/AppBase/Filters/FilterExtensions.cs b/Code/Be/Faster.Zheng.Winin/src/Faster.Zheng.Winin.Application.Contracts/AppBase/Filters/FilterExtensions.cs
index 173eaba..7f75390 100644
--- a/Code/Be/Faster.Zheng.Winin/src/Faster.Zheng.Winin.Application.Contracts/AppBase/Filters/FilterExtensions.cs
+++ b/Code/Be/Faster.Zheng.Winin/src/Faster.Zheng.Winin.Application.Contracts/AppBase/Filters/FilterExtensions.cs
@@ -148,12 +148,12 @@ public static class FilterExtensions
             {
                 var objValue = Convert.ChangeType(value, propertyType.GetGenericArguments()[0],
                     CultureInfo.InvariantCulture);
-                constant = Expression.Constant(objValue);
+                constant = Expression.Constant(objValue, propertyType);
             }
             else if (propertyType.IsEnum)
             {
                 var enumValue = (Enum)Enum.Parse(propertyType, value, true);
-                constant = Expression.Constant(enumValue);
+                constant = Expression.Constant(enumValue, propertyType);
             }
             else
             {