diff --git a/.env b/.env
index ee5ce7c0..017420da 100644
--- a/.env
+++ b/.env
@@ -1,3 +1,15 @@
+# ===----------------------------------------------------------------------===
+# 
+# This source file is part of the MarvelService open source project
+# 
+# Copyright (c) 2025 Röck+Cöde VoF. and the MarvelService project authors
+# Licensed under the EUPL 1.2 or later.
+# 
+# See LICENSE for license information
+# See CONTRIBUTORS for the list of MarvelService project authors
+# 
+# ===----------------------------------------------------------------------===
+
 # --- DOCUMENTATION ---
 
 DOCC_ARCHIVE_OUTPUT=./${SPM_LIBRARY_TARGET}.doccarchive
diff --git a/.gitignore b/.gitignore
index 8fbf40e5..4416f5cf 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,15 @@
+# ===----------------------------------------------------------------------===
+# 
+# This source file is part of the MarvelService open source project
+# 
+# Copyright (c) 2025 Röck+Cöde VoF. and the MarvelService project authors
+# Licensed under the EUPL 1.2 or later.
+# 
+# See LICENSE for license information
+# See CONTRIBUTORS for the list of MarvelService project authors
+# 
+# ===----------------------------------------------------------------------===
+
 # Mac OS
 .DS_Store
 .netrc
diff --git a/Makefile b/Makefile
index 19d04e37..ec03a8bf 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,15 @@
+# ===----------------------------------------------------------------------===
+# 
+# This source file is part of the MarvelService open source project
+# 
+# Copyright (c) 2025 Röck+Cöde VoF. and the MarvelService project authors
+# Licensed under the EUPL 1.2 or later.
+# 
+# See LICENSE for license information
+# See CONTRIBUTORS for the list of MarvelService project authors
+# 
+# ===----------------------------------------------------------------------===
+
 # ENVIRONMENT VARIABLES
 
 environment ?= .env
diff --git a/Package.swift b/Package.swift
index b6c95af7..c8214a11 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,5 +1,17 @@
 // swift-tools-version: 5.10
 
+//===----------------------------------------------------------------------===
+//
+// This source file is part of the MarvelService open source project
+//
+// Copyright (c) -2025 Röck+Cöde VoF. and the MarvelService project authors
+// Licensed under the EUPL 1.2 or later.
+//
+// See LICENSE for license information
+// See CONTRIBUTORS for the list of MarvelService project authors
+//
+//===----------------------------------------------------------------------===
+
 import PackageDescription
 
 let package = Package(