diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 389ac86..27d2821 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -127,6 +127,13 @@ An administrator will create an account for you and give you access to the
 repositories. When you have received the welcome mail from the administrator
 you should login to https://code.cacert.org/ and set your password.
 
+Once you logged in using your password you may choose to add OpenID Connect
+authentication to your account. Visit the
+[Security](https://code.cacert.org/user/settings/security) settings of your
+account and click on "Link account" and choose "cacert-oidc". You can then use
+a CAcert client certificate and use the "Sign in with cacert-oidc" option for
+future logins to the code.cacert.org application.
+
 After this onboarding procedure you can push changes to the repository and
 create pull requests.