diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 48f1d93..398aebb 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -9,11 +9,12 @@ Do create pull requests that:
 Do not create pull requests that:
 
 * introduce a feature or text
-* change the currently used coding style
+* change the interface
+* change the coding style
 
-If a pull request contains unrelated updates, they should be submitted as separate pull requests.
+If a pull request contains unrelated changes, they should be submitted as separate pull requests.
 
 License
 -------
 
-By contributing to the project, you grant the creator of the project a perpetual, worldwide, no-charge, irrevocable license to use, reproduce and distribute your contributions and derivative works. You also warrant that you are the sole owner of your contributions and that they are your original works of authorship.
+By contributing to the project, you grant the creator of the project a perpetual, worldwide, irrevocable license to use, reproduce and distribute your contributions and derivative works. You also warrant that you are the sole owner of your contributions and that they are your original works of authorship.