diff --git a/VDSSample/ViewControllers/TableViewController.swift b/VDSSample/ViewControllers/TableViewController.swift
index 02326da..ffbb9c3 100644
--- a/VDSSample/ViewControllers/TableViewController.swift
+++ b/VDSSample/ViewControllers/TableViewController.swift
@@ -53,23 +53,29 @@ class TableViewController: BaseViewController<Table> {
         }
         
         headerLineStylePicker.onPickerDidSelect = { [weak self] item in
-            let headers = self?.component.tableHeader ?? [[]]
-            for currentRow in headers {
-                for var currentItem in currentRow {
-                    currentItem.bottomLine = item
+            var headers = self?.component.tableHeader ?? [[]]
+            for currentHeaderIndex in 0..<headers.count {
+                var currentHeader = headers[currentHeaderIndex]
+                for currentHeaderItem in 0..<currentHeader.count {
+                    currentHeader[currentHeaderItem].bottomLine = item
                 }
+                headers[currentHeaderIndex] = currentHeader
             }
             self?.component.tableHeader = headers
         }
         
         rowLineStylePicker.onPickerDidSelect = { [weak self] item in
             
-            let rows = self?.component.tableRows ?? [[]]            
-            for currentRow in rows {
-                for var currentItem in currentRow {
-                    currentItem.bottomLine = item
+            var rows = self?.component.tableRows ?? [[]]
+            
+            for currentRowIndex in 0..<rows.count {
+                var currentRow = rows[currentRowIndex]
+                for currentRowItem in 0..<currentRow.count {
+                    currentRow[currentRowItem].bottomLine = item
                 }
+                rows[currentRowIndex] = currentRow
             }
+            
             self?.component.tableRows = rows
         }