README.md in survey-gizmo-ruby-6.7.0 vs README.md in survey-gizmo-ruby-7.0.0

@@ -16,9 +16,13 @@
 gem 'survey-gizmo-ruby'
 ```
 
 ## Configuration
 
+The configuration is thread safe.
+When a new thread is created, the last configuration set through `SurveyGizmo.configure` or `SurveyGizmo.configuration=` will be used.
+When `SurveyGizmo.reset!` is called, only the current thread configuration will be reset.
+
 ```ruby
 require 'survey-gizmo-ruby'
 
 # Configure your credentials
 SurveyGizmo.configure do |config|