diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
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+When reporting an issue and especially submitting a pull request, please
+make sure that you are acquainted with Contributor Guidelines:
+
+https://github.com/micropython/micropython/wiki/ContributorGuidelines
+
+and Code Conventions:
+
+https://github.com/micropython/micropython/blob/master/CODECONVENTIONS.md