diff --git a/dump.go b/dump.go
index 2411be1..e8a28e1 100644
--- a/dump.go
+++ b/dump.go
@@ -444,7 +444,7 @@ func (table *table) Init() error {
 func reflectColumnType(tp *sql.ColumnType) reflect.Type {
 	// reflect for ScanType
 	switch tp.ScanType().Kind() {
-	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
 		return reflect.TypeOf(sql.NullInt64{})
 	case reflect.Float32, reflect.Float64:
 		return reflect.TypeOf(sql.NullFloat64{})
@@ -531,6 +531,12 @@ func (table *table) RowBuffer() *bytes.Buffer {
 			} else {
 				fmt.Fprintf(&b, "_binary '%s'", sanitize(string(*s)))
 			}
+		case *sql.NullTime:
+			if s.Valid {
+				fmt.Fprintf(&b, "'%s'", s.Time.Format(time.RFC3339))
+			} else {
+				b.WriteString(nullType)
+			}
 		default:
 			fmt.Fprintf(&b, "'%s'", value)
 		}