diff --git a/README.md b/README.md
index c11dbad..e635358 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,9 @@ Use [active_model_serializers](https://github.com/rails-api/active_model_seriali
 [![Build Status](https://api.travis-ci.org/jrhe/grape-active_model_serializers.png)](http://travis-ci.org/jrhe/grape-active_model_serializers) [![Dependency Status](https://gemnasium.com/jrhe/grape-active_model_serializers.png)](https://gemnasium.com/jrhe/grape-active_model_serializers) [![Code Climate](https://codeclimate.com/github/jrhe/grape-active_model_serializers.png)](https://codeclimate.com/github/jrhe/grape-active_model_serializers)
 
 ## Breaking Changes
+#### v1.2.1
+* Adds support for active model serializer 0.9.x
+
 #### v1.0.0
 * *BREAKING* Changes behaviour of root keys when serialising arrays. See [Array roots](https://github.com/jrhe/grape-active_model_serializers#array-roots)
 
diff --git a/lib/grape-active_model_serializers/version.rb b/lib/grape-active_model_serializers/version.rb
index d0db72e..0031454 100644
--- a/lib/grape-active_model_serializers/version.rb
+++ b/lib/grape-active_model_serializers/version.rb
@@ -1,5 +1,5 @@
 module Grape
   module ActiveModelSerializers
-    VERSION = '1.2.0'
+    VERSION = '1.2.1'
   end
 end