diff --git a/Gemfile.lock b/Gemfile.lock
index 0ce084c..c2c5f09 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,14 +2,11 @@ PATH
   remote: .
   specs:
     rabl-fast-json (0.1.0)
-      rails (~> 3.2.1)
+      activesupport (~> 3.2.1)
 
 GEM
   remote: http://rubygems.org/
   specs:
-    actionmailer (3.2.1)
-      actionpack (= 3.2.1)
-      mail (~> 2.4.0)
     actionpack (3.2.1)
       activemodel (= 3.2.1)
       activesupport (= 3.2.1)
@@ -23,31 +20,16 @@ GEM
     activemodel (3.2.1)
       activesupport (= 3.2.1)
       builder (~> 3.0.0)
-    activerecord (3.2.1)
-      activemodel (= 3.2.1)
-      activesupport (= 3.2.1)
-      arel (~> 3.0.0)
-      tzinfo (~> 0.3.29)
-    activeresource (3.2.1)
-      activemodel (= 3.2.1)
-      activesupport (= 3.2.1)
     activesupport (3.2.1)
       i18n (~> 0.6)
       multi_json (~> 1.0)
-    arel (3.0.2)
     builder (3.0.0)
     erubis (2.7.0)
     hike (1.2.1)
     i18n (0.6.0)
     journey (1.0.3)
     json (1.6.5)
-    mail (2.4.4)
-      i18n (>= 0.4.0)
-      mime-types (~> 1.16)
-      treetop (~> 1.4.8)
-    mime-types (1.18)
     multi_json (1.1.0)
-    polyglot (0.3.3)
     rack (1.4.1)
     rack-cache (1.1)
       rack (>= 0.4)
@@ -55,14 +37,6 @@ GEM
       rack
     rack-test (0.6.1)
       rack (>= 1.0)
-    rails (3.2.1)
-      actionmailer (= 3.2.1)
-      actionpack (= 3.2.1)
-      activerecord (= 3.2.1)
-      activeresource (= 3.2.1)
-      activesupport (= 3.2.1)
-      bundler (~> 1.0)
-      railties (= 3.2.1)
     railties (3.2.1)
       actionpack (= 3.2.1)
       activesupport (= 3.2.1)
@@ -81,15 +55,13 @@ GEM
     sqlite3 (1.3.5)
     thor (0.14.6)
     tilt (1.3.3)
-    treetop (1.4.10)
-      polyglot
-      polyglot (>= 0.3.1)
-    tzinfo (0.3.32)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
+  actionpack (~> 3.2.1)
   rabl-fast-json!
+  railties (~> 3.2.1)
   rspec-mocks
   sqlite3
diff --git a/rabl-fast-json.gemspec b/rabl-fast-json.gemspec
index 5e7b87d..de27583 100644
--- a/rabl-fast-json.gemspec
+++ b/rabl-fast-json.gemspec
@@ -16,7 +16,9 @@ Gem::Specification.new do |s|
   s.files = Dir["{app,config,db,lib}/**/*"] + ["MIT-LICENSE", "Rakefile", "README.md"]
   s.test_files = Dir["test/**/*"]
 
-  s.add_dependency "rails", "~> 3.2.1"
+  s.add_dependency "activesupport", "~> 3.2.1"
 
   s.add_development_dependency "sqlite3"
+  s.add_development_dependency "railties", "~> 3.2.1"
+  s.add_development_dependency "actionpack", "~> 3.2.1"
 end