diff --git a/app/__init__.py b/app/__init__.py
index cd293ad8a..c2b53d404 100644
--- a/app/__init__.py
+++ b/app/__init__.py
@@ -136,7 +136,7 @@ def register_blueprint(application):
     application.register_blueprint(delivery_blueprint)
 
     inbound_number_blueprint.before_request(requires_admin_auth)
-    application.register_blueprint(inbound_number_blueprint, url_prefix='/inbound_number')
+    application.register_blueprint(inbound_number_blueprint, url_prefix='/inbound-number')
 
     inbound_sms_blueprint.before_request(requires_admin_auth)
     application.register_blueprint(inbound_sms_blueprint)