diff --git a/Src/Asp.NetCore2/SqlSugar/Realization/Kdbndp/SqlBuilder/KdbndpUpdateBuilder.cs b/Src/Asp.NetCore2/SqlSugar/Realization/Kdbndp/SqlBuilder/KdbndpUpdateBuilder.cs
index f2985bd9f..4f1a1956a 100644
--- a/Src/Asp.NetCore2/SqlSugar/Realization/Kdbndp/SqlBuilder/KdbndpUpdateBuilder.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Realization/Kdbndp/SqlBuilder/KdbndpUpdateBuilder.cs
@@ -168,6 +168,10 @@ namespace SqlSugar
                             {
                                 dbType = "numeric(18,6)";
                             }
+                            if (dbType.EqualCase("USER-DEFINED")&&it.Value is DateTime) 
+                            {
+                                dbType = "datetime";
+                            }
                         }
                         if (IsSqlServerModel())
                         {
diff --git a/Src/Asp.NetCore2/SqlSugar/SqlSugarForCore.nuspec b/Src/Asp.NetCore2/SqlSugar/SqlSugarForCore.nuspec
index dc90090cd..1e68e0ad8 100644
--- a/Src/Asp.NetCore2/SqlSugar/SqlSugarForCore.nuspec
+++ b/Src/Asp.NetCore2/SqlSugar/SqlSugarForCore.nuspec
@@ -2,7 +2,7 @@
 <package >
   <metadata>
     <id>SqlSugarCore</id>
-    <version>5.1.4.200-preview02</version>
+    <version>5.1.4.200-preview18</version>
     <authors>sunkaixuan</authors>
     <owners>果糖大数据科技</owners>
     <licenseUrl>http://www.apache.org/licenses/LICENSE-2.0.html</licenseUrl>