README.md in smartsend-ruby-0.4.3 vs README.md in smartsend-ruby-0.5.0

- old
+ new

@@ -151,9 +151,12 @@
   => false
 ```
 
 ## Changelog
 
+### [0.5.0] - 2018-05-15
+* Find label by tracking_code
+
 ### [0.4.3] - 2018-05-03
 * Using prod url
 
 ### [0.4.2] - 2018-05-03
 * Changed `sub_total` to `subtotal`