diff --git a/classes/service/form.php b/classes/service/form.php
index 065e1b8..61e2615 100644
--- a/classes/service/form.php
+++ b/classes/service/form.php
@@ -226,6 +226,10 @@ public function validateFieldsData(array $fields, array &$data)
             $errors['form_captcha'] = __('You have not passed the spam test. Please try again.');
         }
 
+        if(!empty(\Session::get('captcha.'.$this->form->form_id)) {
+            \Session::set('captcha.'.$this->form->form_id, null);
+        }
+
         return $errors;
     }
 }
diff --git a/views/front/form/field/captcha.view.php b/views/front/form/field/captcha.view.php
index d9a93e8..1800d37 100644
--- a/views/front/form/field/captcha.view.php
+++ b/views/front/form/field/captcha.view.php
@@ -12,12 +12,16 @@
 
 \Nos\I18n::current_dictionary('noviusos_form::common');
 
-$number_1 = mt_rand(1, 10);
-$number_2 = mt_rand(1, 50);
-if (mt_rand(1, 2) == 1) {
-    list($number_2, $number_1) = array($number_1, $number_2);
+if(!\Session::get('captcha.'.$form->form_id)) {
+    $number_1 = mt_rand(1, 10);
+    $number_2 = mt_rand(1, 50);
+    if (mt_rand(1, 2) == 1) {
+        list($number_2, $number_1) = array($number_1, $number_2);
+    }
+    \Session::set('captcha.'.$form->form_id, $number_1 + $number_2);
+} else {
+    list($number_1, $number_2) = \Session::get('captcha.'.$form->form_id);
 }
-\Session::set('captcha.'.$form->form_id, $number_1 + $number_2);
 
 $field['label'] = strtr(__('Help us prevent spam: How much is {{number_1}} plus {{number_2}}?'), array(
     '{{number_1}}' => $number_1,