diff --git a/LICENSE.txt b/LICENSE.txt
index 23cee9357c..5ec4fb9b1a 100644
--- a/LICENSE.txt
+++ b/LICENSE.txt
@@ -1,5 +1,20 @@
-Copyright (c) 2013 Quintel Intelligence B.V.
+Copyright (c) 2013 ENERGYTRANSTIONMODEL.COM / QUINTEL INTELLIGENCE B.V., the
+Netherlands.
 
-Nothing of this repository may be copied or used in whatever
-form without the explicit written consent of Quintel Intelligence B.V.
+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.md b/README.md
index 13d45c1d1b..ef6aa73975 100644
--- a/README.md
+++ b/README.md
@@ -12,6 +12,17 @@ You may also wish to view the [Atlas readme][atlas-readme] for information on
 loading the ETSource data in a console, importing data from the old InputExcel
 output files, or for instructions on exporting data for ETEngine.
 
+## Open Source
+
+ETSource is released under the [MIT License](LICENSE.txt).
+
+The sole exception to this is the **energy balance** in [datasets](datasets).
+These Energy Balances come from the [IEA][IEA], that does not allow
+redistribution of their data. You may want to purchase this data [with the
+IEA](http://data.iea.org/IEASTORE/DEFAULT.ASP) and replace it.
+
+Please [contact us][contact] when you have questions.
+
 ## "Active" Documents
 
 Files with an ".ad" extension are editable through the [Atlas console][console]
@@ -340,3 +351,5 @@ viewed on ETModel.
 [refinery]:     https://github.com/quintel/refinery
 [etengine]:     https://github.com/quintel/etengine
 [console]:      https://github.com/quintel/atlas#using-the-atlas-console
+[IEA]:          https://iea.org
+[contact]:      http://quintel.com/contact