Gemfile in yaml-0.2.0 vs Gemfile in yaml-0.2.1

@@ -1,9 +1,12 @@
 source "https://rubygems.org"
 
-gemspec
-
 group :development do
   gem "bundler"
   gem "rake"
   gem "test-unit"
+
+  # Workaround for `unsafe_load`
+  if "3.0" > RUBY_VERSION
+    gem "psych", ">= 4.0"
+  end
 end