diff --git a/src/Meetup/MeetupEventRepository.php b/src/Meetup/MeetupEventRepository.php
index a347867..5a75f51 100644
--- a/src/Meetup/MeetupEventRepository.php
+++ b/src/Meetup/MeetupEventRepository.php
@@ -23,7 +23,7 @@ final class MeetupEventRepository implements EventRepository
         $rsvps = json_decode($response->getContent());
 
         return Collection::make($rsvps)
-            ->filter(fn (\stdClass $rsvp): bool => $rsvp->response == 'yes')
+            ->filter(fn (\stdClass $rsvp): bool => $rsvp->response == RsvpResponse::RESPONSE_YES)
             ->filter(fn (\stdClass $attendee): bool => !$attendee->member->event_context->host)
             ->map(function (\stdClass $attendee): \stdClass {
                 $attendee->is_attending = true;
diff --git a/src/Meetup/RsvpResponse.php b/src/Meetup/RsvpResponse.php
new file mode 100644
index 0000000..58443c3
--- /dev/null
+++ b/src/Meetup/RsvpResponse.php
@@ -0,0 +1,11 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Meetup;
+
+final class RsvpResponse
+{
+    public const RESPONSE_NO = 'no';
+    public const RESPONSE_YES = 'yes';
+}