diff --git a/flashy/settings.py b/flashy/settings.py
index ba446db..0f29aa5 100644
--- a/flashy/settings.py
+++ b/flashy/settings.py
@@ -28,7 +28,7 @@ INSTALLED_APPS = [
     'rest_framework_swagger',
     'rest_framework',
 ]
-if IN_PRODUCTION: INSTALLED_APPS += 'django_ses'
+if IN_PRODUCTION: INSTALLED_APPS.append('django_ses')
 
 MIDDLEWARE_CLASSES = (
     'django.contrib.sessions.middleware.SessionMiddleware',