diff --git a/lib/elements.js b/lib/elements.js
index 38b8890..e71ddf9 100644
--- a/lib/elements.js
+++ b/lib/elements.js
@@ -1,3 +1,19 @@
+/*
+elements.js
+
+Copyright (c) 2015 Bruno Dias
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+*/
+
 'use strict'
 
 /* Element Helpers */
diff --git a/lib/oneOf.js b/lib/oneOf.js
index eee0c04..4129ee6 100644
--- a/lib/oneOf.js
+++ b/lib/oneOf.js
@@ -1,3 +1,19 @@
+/*
+oneOf.js
+
+Copyright (c) 2015 Bruno Dias
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+*/
+
 'use strict'
 
 /*
diff --git a/lib/qualities.js b/lib/qualities.js
index 836e430..cb53181 100644
--- a/lib/qualities.js
+++ b/lib/qualities.js
@@ -1,3 +1,19 @@
+/*
+qualities.js
+
+Copyright (c) 2015 Bruno Dias
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+*/
+
 'use strict'
 
 /*
diff --git a/lib/situation.js b/lib/situation.js
index a78ffe0..87b5798 100644
--- a/lib/situation.js
+++ b/lib/situation.js
@@ -1,3 +1,19 @@
+/*
+situation.js
+
+Copyright (c) 2015 Bruno Dias
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+*/
+
 'use strict'
 
 var undum = require('undum-commonjs'),