diff --git a/vendor/travis-core/lib/travis/addons/flowdock/event_handler.rb b/vendor/travis-core/lib/travis/addons/flowdock/event_handler.rb
index 64adb5bc..0743ae44 100644
--- a/vendor/travis-core/lib/travis/addons/flowdock/event_handler.rb
+++ b/vendor/travis-core/lib/travis/addons/flowdock/event_handler.rb
@@ -16,7 +16,7 @@ module Travis
 
         def initialize(*)
           super
-          @payload = Serializer.data(object, for: 'event', version: 'v0', params: data)
+          @payload = Api::Serialize.data(object, for: 'event', version: 'v0', params: data)
         end
 
         def handle?
diff --git a/vendor/travis-core/lib/travis/addons/pusher/event_handler.rb b/vendor/travis-core/lib/travis/addons/pusher/event_handler.rb
index ec11da32..3c72efea 100644
--- a/vendor/travis-core/lib/travis/addons/pusher/event_handler.rb
+++ b/vendor/travis-core/lib/travis/addons/pusher/event_handler.rb
@@ -16,7 +16,7 @@ module Travis
 
         def initialize(*)
           super
-          @pusher_payload = Serializer.data(object, :for => 'pusher', :type => type, :params => data) if handle?
+          @pusher_payload = Api::Serialize.data(object, :for => 'pusher', :type => type, :params => data) if handle?
         end
 
         def handle?
diff --git a/vendor/travis-core/lib/travis/addons/webhook/event_handler.rb b/vendor/travis-core/lib/travis/addons/webhook/event_handler.rb
index 94f2d947..3a705090 100644
--- a/vendor/travis-core/lib/travis/addons/webhook/event_handler.rb
+++ b/vendor/travis-core/lib/travis/addons/webhook/event_handler.rb
@@ -25,7 +25,7 @@ module Travis
         end
 
         def webhook_payload
-          Serializer.data(object, :for => 'webhook', :type => 'build/finished', :version => 'v1')
+          Api::Serialize.data(object, :for => 'webhook', :type => 'build/finished', :version => 'v1')
         end
 
         def targets
diff --git a/vendor/travis-core/lib/travis/event/handler.rb b/vendor/travis-core/lib/travis/event/handler.rb
index 9930fd34..63edbd65 100644
--- a/vendor/travis-core/lib/travis/event/handler.rb
+++ b/vendor/travis-core/lib/travis/event/handler.rb
@@ -18,7 +18,7 @@ module Travis
 
       class << self
         def notify(event, object, data = {})
-          payload = Api.data(object, for: 'event', version: 'v0', params: data) if object.is_a?(Build)
+          payload = Travis::Api::Serialize.data(object, for: 'event', version: 'v0', params: data) if object.is_a?(Build)
           handler = new(event, object, data, payload)
           handler.notify if handler.handle?
         end