diff --git a/README.md b/README.md
index 2de789a3..ff903e68 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,7 @@
 
 ![build](https://github.com/fnuecke/oc2/workflows/build/badge.svg)
 [![nightly](https://img.shields.io/badge/Builds-nightly-blue)](https://nightly.link/fnuecke/oc2/workflows/build/1.16/Artifacts.zip)
+[![sedna](https://img.shields.io/badge/Requires-OC2%20Sedna-red)](https://nightly.link/fnuecke/oc2-sedna/workflows/build/1.16/Artifacts.zip)
 
 Yet another computer mod.