diff --git a/fep/67ff/fep-67ff.md b/fep/67ff/fep-67ff.md
index 33cf1fc..997f041 100644
--- a/fep/67ff/fep-67ff.md
+++ b/fep/67ff/fep-67ff.md
@@ -65,6 +65,7 @@ The `FEDERATION.md` file can have arbitrary structure and content. The only requ
 - [Postmarks](https://github.com/ckolderup/postmarks/blob/main/FEDERATION.md)
 - [Bovine](https://bovine-herd.readthedocs.io/en/latest/FEDERATION/) in [repo](https://codeberg.org/bovine/bovine/src/branch/main/bovine_herd/docs/docs/FEDERATION.md) and the [symlink](https://codeberg.org/bovine/bovine/src/branch/main/FEDERATION.md)
 - [BookWyrm](https://github.com/bookwyrm-social/bookwyrm/blob/main/FEDERATION.md)
+- [Hatsu](https://github.com/importantimport/hatsu/blob/main/FEDERATION.md)
 
 ## References