diff --git a/CHANGELOG.md b/CHANGELOG.md
index bfb92c5e5..289f5a12f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,7 @@
 # Changelog Fab-manager
 
+- Fix a bug: unable to reserve an event
+
 ## v5.8.0 2023 March 03
 
 - OpenAPI events endpoint returns category, theme and age_range
diff --git a/app/models/reservation.rb b/app/models/reservation.rb
index c3a07e700..8140cd7b3 100644
--- a/app/models/reservation.rb
+++ b/app/models/reservation.rb
@@ -121,7 +121,7 @@ class Reservation < ApplicationRecord
   end
 
   def extend_subscription
-    Subscriptions::ExtensionAfterReservation.new(self).extend_subscription_if_eligible
+    ::Subscriptions::ExtensionAfterReservation.new(self).extend_subscription_if_eligible
   end
 
   def notify_member_create_reservation
diff --git a/app/services/subscriptions/expire_service.rb b/app/services/subscriptions/expire_service.rb
index 7eaa1adbf..e84d8c8f4 100644
--- a/app/services/subscriptions/expire_service.rb
+++ b/app/services/subscriptions/expire_service.rb
@@ -1,5 +1,8 @@
 # frozen_string_literal: true
 
+# Services around subscriptions
+module Subscriptions; end
+
 # Expire the given subscription
 class Subscriptions::ExpireService
   class << self
diff --git a/app/services/subscriptions/extension_after_reservation.rb b/app/services/subscriptions/extension_after_reservation.rb
index b6d9f77ab..0bd7463bf 100644
--- a/app/services/subscriptions/extension_after_reservation.rb
+++ b/app/services/subscriptions/extension_after_reservation.rb
@@ -1,5 +1,8 @@
 # frozen_string_literal: true
 
+# Services around subscriptions
+module Subscriptions; end
+
 # Extend the user's current subscription after his first training reservation if
 # he subscribed to a rolling plan
 class Subscriptions::ExtensionAfterReservation