diff --git a/Gemfile b/Gemfile
index 168f90eed..53e1ff79e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -89,7 +89,6 @@ gem 'ruby-oembed', '~> 0.8.7'
 
 gem 'resque', '1.22.0'
 gem 'resque-timeout', '1.0.0'
-gem 'SystemTimer', '1.2.3', :platforms => :ruby_18
 
 # tags
 
@@ -165,18 +164,16 @@ group :test do
 end
 
 group :test, :development do
-  gem 'debugger', :platforms => :mri_19
+  gem 'debugger'
   gem "rspec-rails", "~> 2.10" 
-  gem 'ruby-debug', :platforms => :mri_18
 end
 
 group :development do
   gem 'heroku'
-  gem 'heroku_san', '3.0.4', :platforms => :mri_19
+  gem 'heroku_san', '3.0.4'
   gem 'capistrano', :require => false
   gem 'capistrano_colors', :require => false
   gem 'capistrano-ext', :require => false
-  gem 'linecache', '0.46', :platforms => :mri_18
   gem 'yard', :require => false
 
   # for tracing AR object instantiation and memory usage per request
diff --git a/Gemfile.lock b/Gemfile.lock
index 6511451e2..c6dbd2359 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -51,7 +51,6 @@ GIT
 GEM
   remote: http://rubygems.org/
   specs:
-    SystemTimer (1.2.3)
     actionmailer (3.2.8)
       actionpack (= 3.2.8)
       mail (~> 2.4.4)
@@ -258,8 +257,6 @@ GEM
     launchy (2.1.2)
       addressable (~> 2.3)
     libwebsocket (0.1.5)
-    linecache (0.46)
-      rbx-require-relative (> 0.0.4)
     listen (0.4.2)
       rb-fchange (~> 0.0.5)
       rb-fsevent (~> 0.9.1)
@@ -360,7 +357,6 @@ GEM
     rb-fsevent (0.9.1)
     rb-inotify (0.8.8)
       ffi (>= 0.5.0)
-    rbx-require-relative (0.0.9)
     rdoc (3.12)
       json (~> 1.4)
     redcarpet (2.1.1)
@@ -394,11 +390,6 @@ GEM
       activesupport (>= 3.0)
       railties (>= 3.0)
       rspec (~> 2.11.0)
-    ruby-debug (0.10.4)
-      columnize (>= 0.1)
-      ruby-debug-base (~> 0.10.4.0)
-    ruby-debug-base (0.10.4)
-      linecache (>= 0.3)
     ruby-hmac (0.4.0)
     ruby-oembed (0.8.7)
     ruby-progressbar (0.0.10)
@@ -465,7 +456,6 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  SystemTimer (= 1.2.3)
   activerecord-import (~> 0.2.9)
   acts-as-taggable-on (= 2.3.3)
   acts_as_api
@@ -506,7 +496,6 @@ DEPENDENCIES
   jasmine!
   jquery-rails
   json
-  linecache (= 0.46)
   markerb!
   messagebus_ruby_api (= 1.0.3)
   mini_magick (= 3.4)
@@ -537,7 +526,6 @@ DEPENDENCIES
   rpm_contrib (~> 2.1.7)
   rspec-instafail (>= 0.1.7)
   rspec-rails (~> 2.10)
-  ruby-debug
   ruby-oembed (~> 0.8.7)
   sass-rails (= 3.2.5)
   selenium-webdriver (~> 2.25)