Gemfile in httpthumbnailer-0.3.0 vs Gemfile in httpthumbnailer-0.3.1

@@ -1,8 +1,8 @@
 source "http://rubygems.org"
 
 gem "sinatra", ">= 1.2.6"
-gem "mongrel", ">= 1.1.5"
+gem "mongrel", ">= 1.2.0.pre2"
 gem "rmagick", "~> 2"
 gem "haml", "~> 3"
 gem "ruby-ip", "~> 0.9"
 gem "cli", "~> 1.1.0"