diff --git a/cl-theme/static/css/style.css b/cl-theme/static/css/style.css
index 2769a13..f300ff2 100644
--- a/cl-theme/static/css/style.css
+++ b/cl-theme/static/css/style.css
@@ -2,7 +2,7 @@
  * bulma css framework (github.com/jgthms | bulma.io)
  * Author: jeremy thomas
  * Author: jesus e.
- * Version: 1.0.5
+ * Version: 1.0.5a
  * Licensed under MIT (https://github.com/jgthms/bulma/blob/master/LICENSE)
  */
 /* basic formatting changes (mostly to cater for darker colours) */
@@ -529,6 +529,10 @@ h2 > a:hover {
     box-shadow: 0 1px 3px rgba(10, 10, 10, 0.1);
 }
 
+.warning-sp {
+    display: none;
+}
+
 .comments-content {
     background-color: #161c1c;
     padding-bottom: 10px;
diff --git a/cl-theme/templates/base.html b/cl-theme/templates/base.html
index 589920a..2e10df6 100644
--- a/cl-theme/templates/base.html
+++ b/cl-theme/templates/base.html
@@ -45,7 +45,7 @@
             <!-- stylesheets -->
             <link rel="stylesheet" href="{{ SITEURL }}/{{ THEME_STATIC_DIR }}/css/bulma.css?v=0.7.4"/>
             <link rel="stylesheet" href="{{ SITEURL }}/{{ THEME_STATIC_DIR }}/css/hover.css"/>
-            <link rel="stylesheet" href="{{ SITEURL }}/{{ THEME_STATIC_DIR }}/css/style.css?v=1.0.5"/>
+            <link rel="stylesheet" href="{{ SITEURL }}/{{ THEME_STATIC_DIR }}/css/style.css?v=1.0.5a"/>
             <!-- favicon -->
             <link rel="icon" href="{{ SITEURL }}/{{ THEME_STATIC_DIR }}/images/favicon/cl-favicon-16x16.png" sizes="16x16"/>
             <link rel="icon" href="{{ SITEURL }}/{{ THEME_STATIC_DIR }}/images/favicon/cl-favicon-32x32.png" sizes="32x32"/>
diff --git a/cl-theme/templates/comments.html b/cl-theme/templates/comments.html
index 92f1e6d..725447a 100644
--- a/cl-theme/templates/comments.html
+++ b/cl-theme/templates/comments.html
@@ -65,6 +65,13 @@
                     </div>
                 </div>
 
+                <div class="warning-sp">
+                    <div class="field-label is-normal">
+                        <label for="empty">{{ _('Deja esto vacío:') }}</label>
+                    </div>
+                    <input id="empty" type="text" name="url" />
+                </div>
+
                 <div class="field is-horizontal">
                     <div class="field-label is-normal">
                         <label class="has-text-white" for="comment">{{ _('Comentario') }}</label>
diff --git a/content/vendor/form-comments/commentsubmit.php b/content/vendor/form-comments/commentsubmit.php
index e10f72b..d2be0e0 100644
--- a/content/vendor/form-comments/commentsubmit.php
+++ b/content/vendor/form-comments/commentsubmit.php
@@ -16,54 +16,56 @@ function seourl($string) {
     return $string;
 }
 
-// Check for empty fields
-if(empty($_POST['name'])    ||
-   empty($_POST['comment']) ||
-   empty($_POST['email'])   ||
-   !filter_var($_POST['email'], FILTER_VALIDATE_EMAIL)
-)
-{
-    // Rediret to current post
-    header( "Location: {$return_url}");
-} else {
-
-    $DATE_FORMAT = "Y-m-d H:i:s";
-    $publish = date($DATE_FORMAT);
-
-    $name = strip_tags(utf8_decode(utf8_encode($_POST['name'])));
-    $link = strip_tags(htmlspecialchars($_POST['link']));
-    $email_address = strip_tags(htmlspecialchars($_POST['email']));
-    $comment = utf8_decode($_POST['comment']);
-
-    // article
-    $postID = str_replace('/','',$post_id);
-
-    // web-site
-    if (!empty($link)) {
-        $web = "Web: {$link}";
+// if the url field is empty
+if(isset($_POST['url']) && $_POST['url'] == '') {
+    // Check for empty fields
+    if(empty($_POST['name'])    ||
+       empty($_POST['comment']) ||
+       empty($_POST['email'])   ||
+       !filter_var($_POST['email'], FILTER_VALIDATE_EMAIL)
+    )
+    {
+        // Rediret to current post
+        header( "Location: {$return_url}");
     } else {
-        $web = NULL;
-    }
 
-    //slug
-    $nslug = seourl($name);
-    $fslug = date("Ymd-H:i:s");
-    $slug = "$nslug-$fslug";
+        $DATE_FORMAT = "Y-m-d H:i:s";
+        $publish = date($DATE_FORMAT);
 
-    // Create the email and send the message
-    // Add your email address
-    $local_address = "heckyel@riseup.net";
-    $recipients = array(
-        $local_address,
-        $email_address,
-        // more emails
-    );
-    $to = implode(',', $recipients);
-    $email_subject = <<<EOT
+        $name = strip_tags(utf8_decode(utf8_encode($_POST['name'])));
+        $link = strip_tags(htmlspecialchars($_POST['link']));
+        $email_address = strip_tags(htmlspecialchars($_POST['email']));
+        $comment = utf8_decode($_POST['comment']);
+
+        // article
+        $postID = str_replace('/','',$post_id);
+
+        // web-site
+        if (!empty($link)) {
+            $web = "Web: {$link}";
+        } else {
+            $web = NULL;
+        }
+
+        //slug
+        $nslug = seourl($name);
+        $fslug = date("Ymd-H:i:s");
+        $slug = "$nslug-$fslug";
+
+        // Create the email and send the message
+        // Add your email address
+        $local_address = "heckyel@riseup.net";
+        $recipients = array(
+            $local_address,
+            $email_address,
+            // more emails
+        );
+        $to = implode(',', $recipients);
+        $email_subject = <<<EOT
 [conocimientoslibres.tuxfamily.org] Mensaje de {$name}
 EOT;
 
-    $email_body = <<<EOT
+        $email_body = <<<EOT
 Nuevo comentario del formulario de conocimientoslibres.tuxfamily.org
 Aqui estan los detalles:\n
 post_id: {$postID}
@@ -77,11 +79,17 @@ Slug: {$slug}
 Responde este mensaje para eliminar el comentario.
 EOT;
 
-    $headers = "From: noreply@conocimientoslibres.tuxfamily.org\n"; // Using something like noreply@yourdomain.com.
-    $headers .= "Reply-To: $local_address";
-    mail($to,$email_subject,utf8_decode($email_body),$headers);
+        $headers = "From: noreply@conocimientoslibres.tuxfamily.org\n"; // Using something like noreply@yourdomain.com.
+        $headers .= "Reply-To: $local_address";
+        mail($to,$email_subject,utf8_decode($email_body),$headers);
 
-    // Rediret to current post
+        // Rediret to current post
+        header("Refresh: 10; URL={$return_url}");
+        printf('Hurra! %s su comentario se envió correctamente,
+volviendo a la web en 10 segundos...', $name);
+    }
+} else {
+    // woow!
     header("Refresh: 10; URL={$return_url}");
     printf('Hurra! %s su comentario se envió correctamente,
 volviendo a la web en 10 segundos...', $name);