README.md in datadog_api_client-1.8.0 vs README.md in datadog_api_client-1.9.0

@@ -5,10 +5,10 @@
 
 ## Requirements
 
 Installing and using the API client library requires:
 
-1. Ruby 2.2+
+1. Ruby 2.6+
 
 ## Installation
 
 The following steps will help you quickly start interacting with Datadog APIs using Ruby client.