diff --git a/horse/horse.kk b/horse/trainee.kk
similarity index 98%
rename from horse/horse.kk
rename to horse/trainee.kk
index b716c1e..c252851 100644
--- a/horse/horse.kk
+++ b/horse/trainee.kk
@@ -1,4 +1,4 @@
-module horse/horse
+module horse/trainee
 
 import std/data/rb-map