diff --git a/Gemfile b/Gemfile
index 923403ea7..0d879e949 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,10 +2,10 @@
 source "http://rubygems.org"
 
 group :development do
-  gem 'rake'
+  gem 'rake', '>= 12.3.3'
   gem 'jbundle', :git => "git@github.com:mloughran/jbundle.git"
-  gem 'sinatra'
+  gem 'sinatra', '>= 2.2.3'
   gem 'pusher'
   gem 'aws-s3'
-  gem 'httparty'
+  gem 'httparty', '>= 0.21.0'
 end