diff --git a/Rakefile b/Rakefile
index abae8b9..7c260ef 100644
--- a/Rakefile
+++ b/Rakefile
@@ -30,6 +30,7 @@ begin
     gemspec.add_dependency("mime-types", ">= 1.15")
     gemspec.add_dependency("activesupport", ">= 2.3.5")
     gemspec.add_dependency("activemodel", ">= 3.0.0.beta4")
+    gemspec.add_dependency("tzinfo", ">= 0.3.22")
     gemspec.version = CouchRest::Model::VERSION
     gemspec.date = "2008-11-22"
     gemspec.require_path = "lib"
diff --git a/lib/couchrest_model.rb b/lib/couchrest_model.rb
index 7859c02..a2c2fd3 100644
--- a/lib/couchrest_model.rb
+++ b/lib/couchrest_model.rb
@@ -1,12 +1,13 @@
-
-# require File.join(File.dirname(__FILE__), "couchrest", "extended_document")
-
-gem 'couchrest'
-
+gem 'couchrest', ">= 1.0.0.beta"
 require 'couchrest'
 
+gem "tzinfo", ">= 0.3.22"
+
+gem "activesupport", ">= 2.3.5"
 require 'active_support/core_ext'
 require 'active_support/json'
+
+gem "activemodel", ">= 3.0.0.beta4"
 require 'active_model'
 require "active_model/callbacks"
 require "active_model/conversion"
@@ -17,6 +18,8 @@ require "active_model/serialization"
 require "active_model/translation"
 require "active_model/validator"
 require "active_model/validations"
+
+gem "mime-types", ">= 1.15"
 require 'mime/types'
 require "enumerator"
 require "time"