README.md in smooch-api-5.20.0 vs README.md in smooch-api-5.21.0

- old
+ new

@@ -23,10 +23,10 @@
 gem install smooch-api
 ```
 
 Add this to the Gemfile:
 
-    gem 'smooch-api', '~> 5.20.0'
+    gem 'smooch-api', '~> 5.21.0'
 
 ## Getting Started
 
 Familiarity with [Smooch API authentication](https://docs.smooch.io/guide/authentication-overview) is recommended.
 