diff --git a/README.md b/README.md
index f767715..dd1a1b5 100644
--- a/README.md
+++ b/README.md
@@ -16,7 +16,7 @@ When data is fetched from a database or received from an external system, the ou
 Add the following line to your Leiningen project:
 
 ```clj
-[namespacefy "0.3"]
+[namespacefy "0.4"]
 ```
 
 # Usage