diff --git a/README.md b/README.md
index d7c0766..358c817 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,7 @@
 #Monoidal Effects
 
+Deprecated by player_monoids.
+
 Motivation
 ==========
 A mod may want to apply status effects to a player, but often this requires