diff --git a/README.md b/README.md
index 149b861..6406fa7 100644
--- a/README.md
+++ b/README.md
@@ -57,7 +57,7 @@ Represents a value which may not exist.
 > Option.zero\<a\>(value: a) -> Option\<a\>
 
 ##### chain :: Option m => m a ~> (a -> m b) -> m b
-> Option\<T\>.chain\<U\>(fn: (value: T) -> Option<U>) -> Option\<U\>
+> Option\<T\>.chain\<U\>(fn: (value: T) -> Option\<U\>) -> Option\<U\>
 
 ##### map :: Option f => f a ~> (a -> b) -> f b
 > Option\<T\>.map\<U\>(fn: (value: T) -> U) -> Option\<U\>