diff --git a/homepage/views/guestbook.pug b/homepage/views/guestbook.pug
index f97ad93..b339bea 100644
--- a/homepage/views/guestbook.pug
+++ b/homepage/views/guestbook.pug
@@ -33,7 +33,7 @@ block content
 		span.captcha
 			input(type='hidden', name='captcha_id' value=captcha_id)
 			img(src='/captcha/'+captcha_id+'/image', alt="CAPTCHA" width='160' height='40')
-			input(type='text' maxlength='6' placeholder='CAPTCHA' name='captcha_answer')
+			input(type='text' maxlength='6' placeholder='CAPTCHA' name='captcha_answer' required)
 			small Will be valid for next #[b 10] minutes.
 		small *Only I can see if set.
 		input(type='submit' value='Send a post')