diff --git a/lib/checkout_sdk.rb b/lib/checkout_sdk.rb
index 91a1dec..c26e0d8 100644
--- a/lib/checkout_sdk.rb
+++ b/lib/checkout_sdk.rb
@@ -9,6 +9,7 @@
 require 'faraday/follow_redirects'
 require 'mime/types'
 require 'logger'
+require 'ostruct'
 
 # Version
 require 'checkout_sdk/version'