diff --git a/articles/miragevpn-performance.md b/articles/miragevpn-performance.md
index fd056ac..2d27eed 100644
--- a/articles/miragevpn-performance.md
+++ b/articles/miragevpn-performance.md
@@ -15,9 +15,11 @@ author:
   email: hannes@mehnert.org
   link: https://hannes.robur.coop
 coauthors:
-  - name: Reynir Björnsson
-    email: reynir@reynir.dk
-    link: https://reyn.ir/
+  - author:
+      name: Reynir Björnsson
+      email: reynir@reynir.dk
+      link: https://reyn.ir/
+    contribution: What is this field used for?
 ---
 
 As we were busy continuing to work on [MirageVPN](https://github.com/robur-coop/miragevpn), we got in touch with [eduVPN](https://eduvpn.org), who are interested about deploying MirageVPN. We got example configuration from their side, and [fixed](https://github.com/robur-coop/miragevpn/pull/201) [some](https://github.com/robur-coop/miragevpn/pull/168) [issues](https://github.com/robur-coop/miragevpn/pull/202), and also implemented [tls-crypt](https://github.com/robur-coop/miragevpn/pull/169) - which was straightforward since we earlier spend time to implement [tls-crypt-v2](https://blog.robur.coop/articles/miragevpn.html).