diff --git a/assets/js/src/form/fields/checkbox.jsx b/assets/js/src/form/fields/checkbox.jsx
index 3da0378233..10d6fad58c 100644
--- a/assets/js/src/form/fields/checkbox.jsx
+++ b/assets/js/src/form/fields/checkbox.jsx
@@ -6,7 +6,7 @@ function(
 ) {
   const FormFieldCheckbox = React.createClass({
     onValueChange: function(e) {
-      e.target.value = this.refs.checkbox.checked ? '1' : '';
+      e.target.value = this.refs.checkbox.checked ? '1' : '0';
       return this.props.onValueChange(e);
     },
     render: function() {
@@ -14,7 +14,9 @@ function(
         return false;
       }
 
-      const isChecked = !!(this.props.item[this.props.field.name]);
+      // isChecked will be true only if the value is "1"
+      // it will be false in case value is "0" or empty
+      const isChecked = !!(~~(this.props.item[this.props.field.name]));
       const options = Object.keys(this.props.field.values).map(
         (value, index) => {
           return (
diff --git a/lib/Form/Block/Checkbox.php b/lib/Form/Block/Checkbox.php
index cb8ac2f028..37c77bff64 100644
--- a/lib/Form/Block/Checkbox.php
+++ b/lib/Form/Block/Checkbox.php
@@ -22,7 +22,7 @@ class Checkbox extends Base {
 
     foreach($options as $option) {
       $html .= '<label class="mailpoet_checkbox_label">';
-      $html .= '<input type="hidden" name="'.$field_name.'" value="" />';
+      $html .= '<input type="hidden" name="'.$field_name.'" value="0" />';
       $html .= '<input type="checkbox" class="mailpoet_checkbox" ';
 
       $html .= 'name="'.$field_name.'" ';
@@ -34,7 +34,7 @@ class Checkbox extends Base {
           $selected_value === ''
           && isset($option['is_checked'])
           && $option['is_checked']
-        ) || ($selected_value === $value)
+        ) || ($selected_value)
       ) ? 'checked="checked"' : '';
 
       $html .= $field_validation;