diff --git a/FreeSql/FreeSql.csproj b/FreeSql/FreeSql.csproj
index 1755002b..18f277ba 100644
--- a/FreeSql/FreeSql.csproj
+++ b/FreeSql/FreeSql.csproj
@@ -2,7 +2,7 @@
 
 	<PropertyGroup>
 		<TargetFramework>netstandard2.0</TargetFramework>
-		<Version>0.4.1.2</Version>
+		<Version>0.4.5</Version>
 		<GeneratePackageOnBuild>true</GeneratePackageOnBuild>
 		<Authors>YeXiangQin</Authors>
 		<Description>FreeSql is the most convenient ORM in dotnet. It supports Mysql, Postgresql, SqlServer, Oracle and Sqlite.</Description>
diff --git a/FreeSql/Internal/CommonProvider/UpdateProvider.cs b/FreeSql/Internal/CommonProvider/UpdateProvider.cs
index 975580a2..7951c178 100644
--- a/FreeSql/Internal/CommonProvider/UpdateProvider.cs
+++ b/FreeSql/Internal/CommonProvider/UpdateProvider.cs
@@ -285,12 +285,13 @@ namespace FreeSql.Internal.CommonProvider {
 			return this;
 		}
 		public IUpdate<T1> Set<TMember>(Expression<Func<T1, TMember>> binaryExpression) {
-			if (binaryExpression?.Body is BinaryExpression == false) return this;
+			if (binaryExpression?.Body is BinaryExpression == false &&
+				binaryExpression?.Body.NodeType != ExpressionType.Call) return this;
 			var cols = new List<SelectColumnInfo>();
 			var expt = _commonExpression.ExpressionWhereLambdaNoneForeignObject(null, cols, binaryExpression, null);
 			if (cols.Any() == false) return this;
 			foreach (var col in cols) {
-				if (col.Column.Attribute.IsNullable == true) {
+				if (col.Column.Attribute.IsNullable == true && col.Column.CsType.IsNullableType()) {
 					var replval = _orm.CodeFirst.GetDbInfo(col.Column.CsType.GenericTypeArguments.FirstOrDefault())?.defaultValue;
 					if (replval == null) continue;
 					var replname = _commonUtils.QuoteSqlName(col.Column.Attribute.Name);