diff --git a/README.md b/README.md
index 7dee6f0..592b833 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,7 @@ Universtität Darmstadt in Germany it is optimized due to user's privacy.
 
 ## Building
 
-Further development requires Android Studio, we recommend to use at least version 2.2.3
+Further development requires Android Studio, we recommend to use at least version 3.0.1
 
 ### API Reference
 
@@ -24,7 +24,7 @@ Target SDK: 25
 
 ## License
 
-Privacy Friendly Sudoku is lisenced under the GPLv3.
+Privacy Friendly Sudoku is lisenced under the GPLv3. Copyright (C) 2016-2018 Christopher Beckmann and Timm Lippert
 
 This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
 
@@ -32,7 +32,7 @@ This program is distributed in the hope that it will be useful, but WITHOUT ANY
 
 You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.
 
-The icons used in the nagivation drawer are licensed under the CC BY 2.5. In addition to them the app uses icons from Google Design Material Icons licensed under Apache License Version 2.0. All other images (the logo of Privacy Friendly Apps, the SECUSO logo, the splash screen logo and the header in the navigation drawer) copyright Technische Universtität Darmstadt (2016).
+The icons used in the nagivation drawer are licensed under the CC BY 2.5. In addition to them the app uses icons from Google Design Material Icons licensed under Apache License Version 2.0. All other images (the logo of Privacy Friendly Apps, the SECUSO logo, the splash screen logo and the header in the navigation drawer) copyright Technische Universtität Darmstadt (2016-2018).
 
 The icons ic_trophy_award_black_48dp and ic_trophy_black_48dp are licensed under the Sil Open Font License Version 1.1.