diff --git a/class_kit.gemspec b/class_kit.gemspec
index e060739..14c0f0a 100644
--- a/class_kit.gemspec
+++ b/class_kit.gemspec
@@ -24,6 +24,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'simplecov', ' ~> 0.22.0'
   spec.add_development_dependency 'simplecov_json_formatter'
 
+  spec.add_dependency 'bigdecimal'
   spec.add_dependency 'hash_kit'
   spec.add_dependency 'json'
 end
diff --git a/lib/class_kit/version.rb b/lib/class_kit/version.rb
index 189d843..995af63 100644
--- a/lib/class_kit/version.rb
+++ b/lib/class_kit/version.rb
@@ -1,5 +1,5 @@
 # Namespace
 module ClassKit
   # :nodoc:
-  VERSION = '0.9.0'
+  VERSION = '0.9.1'
 end