diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..c51c88d
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,16 @@
+This GAP package AttributeScheduler is
+
+Copyright (C) 2025 by Sebastian Gutsche und Markus Baumeister
+
+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.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <https://www.gnu.org/licenses/>.
diff --git a/README.md b/README.md
index 8b90112..9b8cc85 100644
--- a/README.md
+++ b/README.md
@@ -2,9 +2,6 @@
 
 This packages contains methods to construct a graph to compute attributes with dependencies. This means that the graph describes which attribute implies other attributes.
 
-## License
-TODO
-
 ## Installation
 To use this package, go into your local installation directory for GAP (often located under `~/.gap/` ), and clone this repository in the `pkg/`-subfolder:
 
@@ -21,3 +18,7 @@ For using the Package, call
     LoadPackage("AttributeScheduler");
 
 to access the package inside a GAP session.
+
+## License
+AttributeScheduler 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. 
+For details see the LICENSE file.