diff --git a/.eslintrc.js b/.eslintrc.js
index 6710f8a..d9d68d8 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -1,3 +1,10 @@
+/*
+ * Copyright (C) Sapphirecode - All Rights Reserved
+ * This file is part of Password-Helper which is released under MIT.
+ * See file 'LICENSE' for full license details.
+ * Created by Timo Hocker <timo@scode.ovh>, March 2020
+ */
+
 module.exports = {
   env: {
     commonjs: true,
diff --git a/index.js b/index.js
index 1b54477..895fa56 100644
--- a/index.js
+++ b/index.js
@@ -1,5 +1,7 @@
 /*
  * Copyright (C) Sapphirecode - All Rights Reserved
+ * This file is part of Password-Helper which is released under MIT.
+ * See file 'LICENSE' for full license details.
  * Created by Timo Hocker <timo@scode.ovh>, March 2020
  */
 
diff --git a/jenkins.js b/jenkins.js
index fb5239d..d95cd09 100644
--- a/jenkins.js
+++ b/jenkins.js
@@ -1,3 +1,10 @@
+/*
+ * Copyright (C) Sapphirecode - All Rights Reserved
+ * This file is part of Password-Helper which is released under MIT.
+ * See file 'LICENSE' for full license details.
+ * Created by Timo Hocker <timo@scode.ovh>, March 2020
+ */
+
 /* eslint-disable no-process-exit */
 /* eslint-disable no-console */
 /* eslint-disable no-sync */
diff --git a/stryker.conf.js b/stryker.conf.js
index 9958df2..2be3bc8 100644
--- a/stryker.conf.js
+++ b/stryker.conf.js
@@ -1,3 +1,10 @@
+/*
+ * Copyright (C) Sapphirecode - All Rights Reserved
+ * This file is part of Password-Helper which is released under MIT.
+ * See file 'LICENSE' for full license details.
+ * Created by Timo Hocker <timo@scode.ovh>, March 2020
+ */
+
 'use strict';
 
 /**
diff --git a/test/index.js b/test/index.js
index 3fca307..cfcf394 100644
--- a/test/index.js
+++ b/test/index.js
@@ -1,3 +1,10 @@
+/*
+ * Copyright (C) Sapphirecode - All Rights Reserved
+ * This file is part of Password-Helper which is released under MIT.
+ * See file 'LICENSE' for full license details.
+ * Created by Timo Hocker <timo@scode.ovh>, March 2020
+ */
+
 'use strict';
 
 const helper = require ('../index');