diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index bf7445e13d27d3cc9a4bb246b2a16bd4283fa7a2..b22e60dca6432828ccb70e234471bf93a5bb3277 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1,5 +1,11 @@
 # How to contribute
 
+## Code of conduct
+
+We follow the [Contributor Covenant](https://www.contributor-covenant.org) code
+of conduct, please see the [CODE_OF_CONDUCT.md](./CODE_OF_CONDUCT.md) document
+for details.
+
 ## Preparing the development environment
 
 Make sure you have development dependencies installed in your development environment.