unsplash.gemspec in unsplash-1.0.0.pre.rc.1 vs unsplash.gemspec in unsplash-1.0.0.pre.rc.2

@@ -16,9 +16,11 @@
   spec.files         = `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
   spec.bindir        = "exe"
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ["lib"]
 
+  spec.required_ruby_version = ">= 2.0.0"
+
   spec.add_dependency "httparty", "~> 0.13.5"
   spec.add_dependency "oauth2",   "~> 1.0.0"
 
   # spec.add_development_dependency "bundler", "~> 1.10"
   spec.add_development_dependency "rake",    "~> 10.0"