diff --git a/Gemfile b/Gemfile
index d278d37..b785f48 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,7 +2,7 @@ source "https://rubygems.org"
 
 gem "sinatra", '~> 1.4'
 gem "sinatra-contrib"
-gem "activesupport", '~> 3.2'
+gem "activesupport", '~> 4.2'
 gem "riak-client", :github => "5apps/riak-ruby-client", :branch => "invalid_uri_error"
 gem "fog"
 gem "rest-client"
diff --git a/Gemfile.lock b/Gemfile.lock
index 196feac..49fafe1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -13,9 +13,12 @@ GIT
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (3.2.18)
-      i18n (~> 0.6, >= 0.6.4)
-      multi_json (~> 1.0)
+    activesupport (4.2.1)
+      i18n (~> 0.7)
+      json (~> 1.7, >= 1.7.7)
+      minitest (~> 5.1)
+      thread_safe (~> 0.3, >= 0.3.4)
+      tzinfo (~> 1.1)
     backports (3.6.4)
     beefcake (0.3.7)
     builder (3.2.2)
@@ -39,6 +42,7 @@ GEM
       domain_name (~> 0.5)
     i18n (0.7.0)
     innertube (1.0.2)
+    json (1.8.2)
     kgio (2.9.3)
     m (1.3.4)
       method_source (>= 0.6.7)
@@ -85,7 +89,10 @@ GEM
       rack-test
       sinatra (~> 1.4.0)
       tilt (~> 1.3)
+    thread_safe (0.3.5)
     tilt (1.4.1)
+    tzinfo (1.2.2)
+      thread_safe (~> 0.1)
     unf (0.1.4)
       unf_ext
     unf_ext (0.0.7.1)
@@ -98,7 +105,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  activesupport (~> 3.2)
+  activesupport (~> 4.2)
   fog
   m
   mime-types (~> 2.6.1)