diff --git a/.ruby-version b/.ruby-version
index ae6d5b9..77fee73 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-1.9.3-p392
+1.9.3
diff --git a/Gemfile.lock b/Gemfile.lock
index dbfb8cd..e02c17f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,24 +2,31 @@ PATH
   remote: .
   specs:
     ruby-xcdm (0.0.8)
-      activesupport (~> 3.2)
+      activesupport (~> 4.1)
       builder (~> 3.2)
       plist (~> 3.1)
 
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (3.2.17)
-      i18n (~> 0.6, >= 0.6.4)
-      multi_json (~> 1.0)
+    activesupport (4.1.8)
+      i18n (~> 0.6, >= 0.6.9)
+      json (~> 1.7, >= 1.7.7)
+      minitest (~> 5.1)
+      thread_safe (~> 0.1)
+      tzinfo (~> 1.1)
     ansi (1.4.3)
     builder (3.2.0)
-    i18n (0.6.9)
-    multi_json (1.9.2)
+    i18n (0.6.11)
+    json (1.8.1)
+    minitest (5.5.0)
     plist (3.1.0)
     rake (10.0.4)
+    thread_safe (0.3.4)
     turn (0.9.6)
       ansi
+    tzinfo (1.2.2)
+      thread_safe (~> 0.1)
 
 PLATFORMS
   ruby
diff --git a/ruby-xcdm.gemspec b/ruby-xcdm.gemspec
index d25d545..d8876a1 100644
--- a/ruby-xcdm.gemspec
+++ b/ruby-xcdm.gemspec
@@ -19,7 +19,7 @@ Gem::Specification.new do |spec|
   spec.require_paths = ["lib"]
 
   spec.add_dependency "builder", "~> 3.2"
-  spec.add_dependency "activesupport", "~> 3.2"
+  spec.add_dependency "activesupport", "~> 4.1"
   spec.add_dependency "plist", "~> 3.1"
 
   spec.add_development_dependency "bundler", "~> 1.3"