diff --git a/LICENSE b/LICENSE
index 0a9295b9..6432f74e 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,21 +1,18 @@
-MIT License
+Sponsorship License
 
-Copyright (c) 2017 Eduard Urbach
+Copyright (c) 2019 Eduard Urbach
 
-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:
+* You are permitted to use the software freely for non-commercial purposes.
+* You MUST be a sponsor donating at least 10 USD every month to me if you use the software for commercial purposes.
 
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
+To become a sponsor:
+
+1. Visit the following page: https://github.com/users/akyoto/sponsorship
+2. Register as a sponsor for the 10 USD per month tier.
+
+Additional notes:
+
+* Canceling your sponsorship will also revoke the rights to use the software for commercial purposes.
+* The software is provided "as is", without warranty of any kind.
+* The above copyright notice and this permission must be included in all copies 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/arn/LICENSE b/arn/LICENSE
deleted file mode 100644
index 0a9295b9..00000000
--- a/arn/LICENSE
+++ /dev/null
@@ -1,21 +0,0 @@
-MIT License
-
-Copyright (c) 2017 Eduard Urbach
-
-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.