README.md in lead_zeppelin-0.1.3 vs README.md in lead_zeppelin-0.1.4

@@ -26,11 +26,15 @@
     Thread.abort_on_exception = true
     
 Instantiate a new client and configure it by adding the block of code to handle error responses, and . Provide client.on\_error _before adding applications_.
 
     client = LeadZeppelin::APNS::Client.new do |c|
-      c.on_error do |error_response|
+      c.on_notification_error do |error_response|
         puts "Apple sent back an error response: #{error_response.inspect}"
+      end
+      
+      c.on_certificate_error do |app|
+        puts "Certificate error failed for #{app}"
       end
       
       # You can provide .p12 files too! p12: File.read('./yourapp.p12')
       c.add_application :your_app_identifier, pem: File.read('./yourapp.pem')
     end
\ No newline at end of file