diff --git a/app/api/expenses.tsx b/app/api/expenses.tsx
index 7cfb3a3..f73f6b7 100644
--- a/app/api/expenses.tsx
+++ b/app/api/expenses.tsx
@@ -1,3 +1,5 @@
+/* Copyright (C) 2024 Manuel Bustillo*/
+
 import { Expense } from '@/app/lib/definitions';
 import { getCsrfToken } from '@/app/lib/utils';
 
diff --git a/app/api/groups.tsx b/app/api/groups.tsx
index aeafc4d..e765761 100644
--- a/app/api/groups.tsx
+++ b/app/api/groups.tsx
@@ -1,3 +1,5 @@
+/* Copyright (C) 2024 Manuel Bustillo*/
+
 import { Group } from '@/app/lib/definitions';
 
 export function loadGroups(onLoad?: (groups: Group[]) => void) {
diff --git a/app/api/guests.tsx b/app/api/guests.tsx
index 549356c..6314338 100644
--- a/app/api/guests.tsx
+++ b/app/api/guests.tsx
@@ -1,3 +1,5 @@
+/* Copyright (C) 2024 Manuel Bustillo*/
+
 import { Guest } from '@/app/lib/definitions';
 import { getCsrfToken } from '@/app/lib/utils';
 
diff --git a/app/api/tableSimulations.tsx b/app/api/tableSimulations.tsx
index 51e1fff..4e28688 100644
--- a/app/api/tableSimulations.tsx
+++ b/app/api/tableSimulations.tsx
@@ -1,3 +1,5 @@
+/* Copyright (C) 2024 Manuel Bustillo*/
+
 import { TableArrangement } from '@/app/lib/definitions';
 
 export function loadTableSimulations(onLoad?: (tableSimulations: TableArrangement[]) => void) {