paperclip-globalize3.gemspec in paperclip-globalize3-1.0.0 vs paperclip-globalize3.gemspec in paperclip-globalize3-1.1.0

@@ -1,10 +1,15 @@
 # coding: utf-8
 lib = File.expand_path('../lib', __FILE__)
 $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
 require 'paperclip/globalize3/version'
 
+paperclip_version = '~> 3.3'
+unless ENV['PAPERCLIP_VERSION'].to_s.empty?
+  paperclip_version = Gem::Requirement.new(ENV['PAPERCLIP_VERSION'])
+end
+
 Gem::Specification.new do |spec|
   spec.name          = "paperclip-globalize3"
   spec.version       = Paperclip::Globalize3::VERSION
   spec.authors       = ["Maximilian Herold"]
   spec.email         = ["[e-mail]"]
@@ -16,10 +21,10 @@
   spec.files         = `git ls-files`.split($/)
   spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
   spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = ["lib"]
 
-  spec.add_runtime_dependency "paperclip", "~> 3.3"
+  spec.add_runtime_dependency "paperclip", paperclip_version
   spec.add_runtime_dependency "globalize3", "~> 0.3"
 
   spec.add_development_dependency "bundler", "~> 1.3"
   spec.add_development_dependency "appraisal", "~> 0.5.1"
   spec.add_development_dependency "rspec-rails", "~> 2.8.0"