diff --git a/Gemfile.lock b/Gemfile.lock
index e2c665b..4f31ae0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -5,7 +5,7 @@ PATH
       acts_as_indexed
       coffee-rails (~> 3.2.1)
       coffee_cup
-      dragonfly (~> 0.9.11)
+      dragonfly (>= 0.9.11, < 1.5.0)
       jquery-rails
       rack-cache
       rails (~> 3.2.0)
@@ -17,32 +17,32 @@ PATH
 GEM
   remote: http://rubygems.org/
   specs:
-    actionmailer (3.2.11)
-      actionpack (= 3.2.11)
-      mail (~> 2.4.4)
-    actionpack (3.2.11)
-      activemodel (= 3.2.11)
-      activesupport (= 3.2.11)
+    actionmailer (3.2.22.5)
+      actionpack (= 3.2.22.5)
+      mail (~> 2.5.4)
+    actionpack (3.2.22.5)
+      activemodel (= 3.2.22.5)
+      activesupport (= 3.2.22.5)
       builder (~> 3.0.0)
       erubis (~> 2.7.0)
       journey (~> 1.0.4)
-      rack (~> 1.4.0)
+      rack (~> 1.4.5)
       rack-cache (~> 1.2)
       rack-test (~> 0.6.1)
       sprockets (~> 2.2.1)
-    activemodel (3.2.11)
-      activesupport (= 3.2.11)
+    activemodel (3.2.22.5)
+      activesupport (= 3.2.22.5)
       builder (~> 3.0.0)
-    activerecord (3.2.11)
-      activemodel (= 3.2.11)
-      activesupport (= 3.2.11)
+    activerecord (3.2.22.5)
+      activemodel (= 3.2.22.5)
+      activesupport (= 3.2.22.5)
       arel (~> 3.0.2)
       tzinfo (~> 0.3.29)
-    activeresource (3.2.11)
-      activemodel (= 3.2.11)
-      activesupport (= 3.2.11)
-    activesupport (3.2.11)
-      i18n (~> 0.6)
+    activeresource (3.2.22.5)
+      activemodel (= 3.2.22.5)
+      activesupport (= 3.2.22.5)
+    activesupport (3.2.22.5)
+      i18n (~> 0.6, >= 0.6.4)
       multi_json (~> 1.0)
     acts_as_indexed (0.8.3)
     addressable (2.3.2)
@@ -67,13 +67,14 @@ GEM
       execjs
     coffee-script-source (1.12.2)
     coffee_cup (0.0.4)
-    concurrent-ruby (1.1.4)
+    concurrent-ruby (1.1.8)
     database_cleaner (0.9.1)
-    dragonfly (0.9.15)
+    dragonfly (1.4.0)
+      addressable (~> 2.3)
       multi_json (~> 1.0)
-      rack
+      rack (>= 1.3)
     erubis (2.7.0)
-    execjs (2.7.0)
+    execjs (2.8.1)
     ffi (1.8.1)
     formatador (0.2.4)
     guard (1.8.0)
@@ -102,42 +103,41 @@ GEM
       rb-inotify (>= 0.9)
       rb-kqueue (>= 0.2)
     lumberjack (1.0.3)
-    mail (2.4.4)
-      i18n (>= 0.4.0)
+    mail (2.5.5)
       mime-types (~> 1.16)
       treetop (~> 1.4.8)
     method_source (0.8.1)
     mime-types (1.19)
-    multi_json (1.3.6)
+    multi_json (1.15.0)
     nokogiri (1.5.5)
     polyglot (0.3.5)
     pry (0.9.12.2)
       coderay (~> 1.0.5)
       method_source (~> 0.8)
       slop (~> 3.4)
-    rack (1.4.1)
-    rack-cache (1.8.0)
+    rack (1.4.7)
+    rack-cache (1.12.1)
       rack (>= 0.4)
     rack-ssl (1.3.4)
       rack
     rack-test (0.6.2)
       rack (>= 1.0)
-    rails (3.2.11)
-      actionmailer (= 3.2.11)
-      actionpack (= 3.2.11)
-      activerecord (= 3.2.11)
-      activeresource (= 3.2.11)
-      activesupport (= 3.2.11)
+    rails (3.2.22.5)
+      actionmailer (= 3.2.22.5)
+      actionpack (= 3.2.22.5)
+      activerecord (= 3.2.22.5)
+      activeresource (= 3.2.22.5)
+      activesupport (= 3.2.22.5)
       bundler (~> 1.0)
-      railties (= 3.2.11)
-    railties (3.2.11)
-      actionpack (= 3.2.11)
-      activesupport (= 3.2.11)
+      railties (= 3.2.22.5)
+    railties (3.2.22.5)
+      actionpack (= 3.2.22.5)
+      activesupport (= 3.2.22.5)
       rack-ssl (~> 1.3.2)
       rake (>= 0.8.7)
       rdoc (~> 3.4)
       thor (>= 0.14.6, < 2.0)
-    rake (12.3.2)
+    rake (13.0.3)
     rb-fsevent (0.9.3)
     rb-inotify (0.9.0)
       ffi (>= 0.5.0)
@@ -180,10 +180,10 @@ GEM
       polyglot (>= 0.3.1)
     turn (0.9.3)
       ansi
-    tzinfo (0.3.55)
-    uglifier (4.1.20)
+    tzinfo (0.3.60)
+    uglifier (4.2.0)
       execjs (>= 0.3.0, < 3)
-    will_paginate (3.1.6)
+    will_paginate (3.3.0)
     xpath (0.1.4)
       nokogiri (~> 1.3)
 
diff --git a/ample_assets.gemspec b/ample_assets.gemspec
index 32e2684..95a408d 100644
--- a/ample_assets.gemspec
+++ b/ample_assets.gemspec
@@ -16,7 +16,7 @@ Gem::Specification.new do |s|
   s.test_files = Dir["test/**/*"]
 
   s.add_dependency "rails", "~> 3.2.0"
-  s.add_dependency "dragonfly", "~> 0.9.11"
+  s.add_dependency "dragonfly", ">= 0.9.11", "< 1.5.0"
   s.add_dependency "jquery-rails"
   s.add_dependency "rack-cache"
   s.add_dependency "sass-rails", "~> 3.2.3"