assembly-objectfile.gemspec in assembly-objectfile-1.5.0 vs assembly-objectfile.gemspec in assembly-objectfile-1.5.1

@@ -2,10 +2,12 @@
 require 'assembly-objectfile/version'
 
 Gem::Specification.new do |s|
   s.name        = 'assembly-objectfile'
   s.version     = Assembly::ObjectFile::VERSION
+  s.platform    = Gem::Platform::RUBY
+  s.required_ruby_version = '~> 1.8.7'
   s.authors     = ["Peter Mangiafico", "Renzo Sanchez-Silva","Monty Hindman","Tony Calavano"]
   s.email       = ["[e-mail]"]
   s.homepage    = ""
   s.summary     = %q{Ruby immplementation of file services needed to prepare objects to be accessioned in SULAIR digital library}
   s.description = %q{Get exif data, file sizes and more.}
@@ -15,13 +17,15 @@
   s.files         = `git ls-files`.split("\n")
   s.test_files    = `git ls-files -- {test,spec,features}/*`.split("\n")
   s.executables   = `git ls-files -- bin/*`.split("\n").map{ |f| File.basename(f) }
   s.require_paths = ['lib']
 
-  s.add_dependency 'mini_exiftool'
+  s.add_dependency 'mini_exiftool', "~> 1.6"
   s.add_dependency 'mime-types'
-  s.add_dependency 'nokogiri'
+  s.add_dependency 'nokogiri', ((RUBY_VERSION < '1.9') ? "~> 1.5.10" : "~> 1") # 1.6.x requires ruby 1.9
+  s.add_dependency 'activesupport', ((RUBY_VERSION < '1.9.3') ? "~> 3" : "") # 4.0 requires ruby 1.9.3
 
+  s.add_development_dependency 'json'
   s.add_development_dependency "rspec", "~> 2.6"
   s.add_development_dependency "lyberteam-devel", '>= 1.0.1'
   s.add_development_dependency "lyberteam-gems-devel", "> 1.0.0"
   s.add_development_dependency "yard"