diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
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+Do create pull requests that:
+
+* resolve an issue
+* optimise an existing feature or text
+
+Do NOT create pull requests that:
+
+* introduce a feature or text
+* change the currently used coding style
+
+Pull requests should do only ONE thing. If a pull request contains unrelated updates, they should be submitted as separate pull requests.
+
+By contributing to the project, you grant to 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.
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