diff --git a/README.md b/README.md
index a5c5007..c18c425 100644
--- a/README.md
+++ b/README.md
@@ -80,6 +80,6 @@ More information about possible parameters can be found at https://docs.api.ai/d
 
 #Changelog
 
-1.1.3 - fixed non-correctly serialized parameters in new contexts during query send process
-
-1.1.2 - fixed compatibility with ruby version less then 2.1.6
+* 1.1.4 - removed unused dependency and updated default API version 
+* 1.1.3 - fixed non-correctly serialized parameters in new contexts during query send process
+* 1.1.2 - fixed compatibility with ruby version less then 2.1.6
diff --git a/api-ai-ruby.gemspec b/api-ai-ruby.gemspec
index 02fe7eb..b1e94d6 100644
--- a/api-ai-ruby.gemspec
+++ b/api-ai-ruby.gemspec
@@ -18,9 +18,10 @@ Gem::Specification.new do |spec|
   spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = ['lib']
 
+  spec.required_ruby_version = '~> 2.0'
+
   spec.add_development_dependency 'bundler', '~> 1.7'
   spec.add_development_dependency 'rake', '~> 10.0'
   spec.add_dependency 'http', '~> 0.9.4'
-  spec.add_dependency 'http-form_data', '~> 1.0'
 
 end
diff --git a/lib/api-ai-ruby/constants.rb b/lib/api-ai-ruby/constants.rb
index 65c07d2..bfeba7b 100644
--- a/lib/api-ai-ruby/constants.rb
+++ b/lib/api-ai-ruby/constants.rb
@@ -1,8 +1,8 @@
 module ApiAiRuby
   class Constants
-    VERSION = '1.1.3'
+    VERSION = '1.1.4'
     DEFAULT_BASE_URL = 'https://api.api.ai/v1/'
-    DEFAULT_API_VERSION = '20150204'
+    DEFAULT_API_VERSION = '20150910'
     DEFAULT_CLIENT_LANG = 'en'
   end
 end
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