diff --git a/src/checkout/settings.py b/src/checkout/settings.py
index 37bf550..a8dab1a 100644
--- a/src/checkout/settings.py
+++ b/src/checkout/settings.py
@@ -90,6 +90,7 @@ INSTALLED_APPS = [
     "crispy_bootstrap5",
     "django_extensions",
     "django_htmx",
+    "solo",
 ]
 
 MIDDLEWARE = [