diff --git a/README.md b/README.md
index 6c234ce..1edf9df 100644
--- a/README.md
+++ b/README.md
@@ -138,3 +138,4 @@ Outside of nostr itself, you find the community on:
 - [nostr on YouTube](https://www.youtube.com/results?search_query=nostr+protocol)
 - [vanilla-js-nostr](https://github.com/supertestnet/vanilla-js-nostr) - a demo of posting and viewing a feed in nostr using vanilla javascript
 - [nostr workshop with super testnet](https://www.youtube.com/watch?v=HbicnlCXg_Y) 
+- [nostr playground in Ruby](https://github.com/dtonon/nostr-ruby-playground)