diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..7984cc0
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2015 Esteban Manchado Velázquez
+
+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.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/readme.txt b/readme.txt
index 8a350c4..ec4a42a 100644
--- a/readme.txt
+++ b/readme.txt
@@ -1,4 +1,12 @@
-Teal 3d dice sources.
-To run open dice/index.html with your browser.
-Can be used stand-alone.
-dice.py is a GAE serverlet that makes proxy requests to random.org API.
\ No newline at end of file
+Teal 3d dice sources.
+To run open dice/index.html with your browser.
+Can be used stand-alone.
+dice.py is a GAE serverlet that makes proxy requests to random.org API.
+
+
+This is originally taken from
+http://www.teall.info/2014/01/online-3d-dice-roller.html, then
+refactored and imported to GitHub.
+
+License is MIT, authors Anton Natarov (original code) and Esteban
+Manchado Velázquez (refactoring and small improvements).