diff --git a/public/auth.php b/public/auth.php
index 1ca09efa..3e9a4ce5 100644
--- a/public/auth.php
+++ b/public/auth.php
@@ -340,6 +340,16 @@ MSG;
                 break;
             }
 
+            $checkSpamBot = mb_strtolower($_POST['auth']['meow'] ?? '');
+            $spamBotValid = [
+                '19', '21', 'nineteen', 'nine-teen', 'nine teen', 'twentyone', 'twenty-one', 'twenty one',
+            ];
+
+            if (!in_array($checkSpamBot, $spamBotValid)) {
+                $authRegistrationError = 'Human only cool club, robots begone.';
+                break;
+            }
+
             $usernameValidation = user_validate_username($authUsername, true);
             if ($usernameValidation !== '') {
                 $authRegistrationError = $usernameValidationErrors[$usernameValidation];
diff --git a/templates/auth/auth.twig b/templates/auth/auth.twig
index fdee2f62..f72185e5 100644
--- a/templates/auth/auth.twig
+++ b/templates/auth/auth.twig
@@ -33,6 +33,9 @@
                     name="auth[email]" placeholder="E-mail"
                     value="{{ auth_email|default('') }}" required>
 
+                <input class="input__text input__text--new auth__input" type="text"
+                    name="auth[meow]" placeholder="What is the outcome of nine plus ten?" required>
+
                 <button class="input__button input__button--new">Sign up</button>
             </div>
         </form>