diff --git a/README.md b/README.md
index 0fb4c3a244b04f45104e1defd54e79d6cfab6124..27995547f12941acd2843490ca330dc1720163eb 100644
--- a/README.md
+++ b/README.md
@@ -56,3 +56,5 @@ Finally, if you are sure no one else had the issue, follow the **Issue template*
 We welcome contributions to the Arduino ESP32 project!
 
 See [contributing](https://docs.espressif.com/projects/arduino-esp32/en/latest/contributing.html) in the documentation for more information on how to contribute to the project.
+
+> We would like to have this repository in a polite and friendly atmosphere, so please be kind and respectful to others. For more details, look at [Code of Conduct](https://github.com/espressif/arduino-esp32/blob/master/CODE_OF_CONDUCT.md).