diff --git a/src/Pingmint.CodeGen.Sql/CodeFile.cs b/src/Pingmint.CodeGen.Sql/CodeFile.cs
index 952f946..c969e72 100644
--- a/src/Pingmint.CodeGen.Sql/CodeFile.cs
+++ b/src/Pingmint.CodeGen.Sql/CodeFile.cs
@@ -173,11 +173,9 @@ public String GenerateCode()
 
                 using var tableClass = code.PartialClass("public sealed", dataTableClassName, "DataTable");
                 code.Line("public {0}() : this(new List<{1}>()) {{ }}", dataTableClassName, rowClassName);
-                code.Line("public {0}(List<{1}> rows) : base()", dataTableClassName, rowClassName);
+                code.Line("public {0}(List<{1}>? rows) : base()", dataTableClassName, rowClassName);
                 using (code.CreateBraceScope())
                 {
-                    code.Line("ArgumentNullException.ThrowIfNull(rows);");
-                    code.Line();
                     foreach (var col in record.Properties)
                     {
                         var allowDbNull = col.ColumnIsNullable ? "true" : "false";
@@ -185,7 +183,7 @@ public String GenerateCode()
                         var propertyTypeName = col.FieldTypeWithoutNullable;
                         code.Line("base.Columns.Add(new DataColumn() {{ ColumnName = \"{0}\", DataType = typeof({1}), AllowDBNull = {2}{3} }});", col.ColumnName, propertyTypeName, allowDbNull, maxLength);
                     }
-                    using (code.ForEach("var row in rows"))
+                    using (code.ForEach("var row in rows ?? []"))
                     {
                         var parameterBuilder = String.Empty;
                         foreach (var col in record.Properties)
diff --git a/src/Pingmint.CodeGen.Sql/Pingmint.CodeGen.Sql.csproj b/src/Pingmint.CodeGen.Sql/Pingmint.CodeGen.Sql.csproj
index a680669..29b6821 100644
--- a/src/Pingmint.CodeGen.Sql/Pingmint.CodeGen.Sql.csproj
+++ b/src/Pingmint.CodeGen.Sql/Pingmint.CodeGen.Sql.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <Version>0.47</Version>
+    <Version>0.48</Version>
     <OutputType>Exe</OutputType>
     <TargetFramework>net10.0</TargetFramework>
     <LangVersion>latest</LangVersion>