diff --git a/lib/Form/Block/Checkbox.php b/lib/Form/Block/Checkbox.php
index 54a360e5e8..6bc08c5b83 100644
--- a/lib/Form/Block/Checkbox.php
+++ b/lib/Form/Block/Checkbox.php
@@ -8,7 +8,7 @@ class Checkbox extends Base {
   static function render($block) {
     $html = '';
 
-    $field_name = static::getFieldName($block);
+    $field_name = 'data[' . static::getFieldName($block) . ']';
     $field_validation = static::getInputValidation($block);
 
     $html .= '<p class="mailpoet_paragraph">';
diff --git a/lib/Form/Block/Date.php b/lib/Form/Block/Date.php
index 78e463fe66..5eda26168a 100644
--- a/lib/Form/Block/Date.php
+++ b/lib/Form/Block/Date.php
@@ -20,7 +20,7 @@ class Date extends Base {
   private static function renderDateSelect($block = array()) {
     $html = '';
 
-    $field_name = static::getFieldName($block);
+    $field_name = 'data[' . static::getFieldName($block) . ']';
 
     $date_formats = static::getDateFormats();
 
diff --git a/lib/Form/Block/Radio.php b/lib/Form/Block/Radio.php
index aae07b94cd..2ca39c9d8b 100644
--- a/lib/Form/Block/Radio.php
+++ b/lib/Form/Block/Radio.php
@@ -8,7 +8,7 @@ class Radio extends Base {
   static function render($block) {
     $html = '';
 
-    $field_name = static::getFieldName($block);
+    $field_name = 'data[' . static::getFieldName($block) . ']';
     $field_validation = static::getInputValidation($block);
 
     $html .= '<p class="mailpoet_paragraph">';
diff --git a/lib/Form/Block/Segment.php b/lib/Form/Block/Segment.php
index d124057a3b..ac6aee3b2e 100644
--- a/lib/Form/Block/Segment.php
+++ b/lib/Form/Block/Segment.php
@@ -8,7 +8,7 @@ class Segment extends Base {
   static function render($block) {
     $html = '';
 
-    $field_name = static::getFieldName($block);
+    $field_name = 'data[' . static::getFieldName($block) . ']';
     $field_validation = static::getInputValidation($block);
 
     $html .= '<p class="mailpoet_paragraph">';
diff --git a/lib/Form/Block/Select.php b/lib/Form/Block/Select.php
index 9932458306..d1eb6befdc 100644
--- a/lib/Form/Block/Select.php
+++ b/lib/Form/Block/Select.php
@@ -8,7 +8,7 @@ class Select extends Base {
   static function render($block) {
     $html = '';
 
-    $field_name = static::getFieldName($block);
+    $field_name = 'data[' . static::getFieldName($block) . ']';
     $field_validation = static::getInputValidation($block);
 
     $html .= '<p class="mailpoet_paragraph">';
diff --git a/lib/Form/Block/Textarea.php b/lib/Form/Block/Textarea.php
index e2dc1ef3cc..da907a4607 100644
--- a/lib/Form/Block/Textarea.php
+++ b/lib/Form/Block/Textarea.php
@@ -15,7 +15,7 @@ class Textarea extends Base {
 
     $html .= '<textarea class="mailpoet_textarea" rows="'.$lines.'" ';
 
-    $html .= 'name="'.static::getFieldName($block).'"';
+    $html .= 'name="data['.static::getFieldName($block).']"';
 
     $html .= static::renderInputPlaceholder($block);