diff --git a/Gemfile b/Gemfile
index c5d75ca..99561ef 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,9 +1,11 @@
 require 'pathname'
 
-source :rubygems
+source 'https://rubygems.org'
 
 gemspec
 
+gem 'backports'
+
 SOURCE         = ENV.fetch('SOURCE', :git).to_sym
 REPO_POSTFIX   = SOURCE == :path ? ''                                : '.git'
 DATAMAPPER     = SOURCE == :path ? Pathname(__FILE__).dirname.parent : 'http://github.com/datamapper'
@@ -16,20 +18,12 @@ gem 'dm-core', DM_VERSION,
   SOURCE  => "#{DATAMAPPER}/dm-core#{REPO_POSTFIX}",
   :branch => CURRENT_BRANCH
 
-group :development do
-
-  gem 'rake',    '~> 0.9.2'
-  gem 'rspec',   '~> 1.3.2'
-
-end
-
 platforms :mri_18 do
   group :quality do
 
     gem 'rcov',      '~> 0.9.10'
     gem 'yard',      '~> 0.7.2'
     gem 'yardstick', '~> 0.4'
-
   end
 end
 
diff --git a/spec/rcov.opts b/spec/rcov.opts
deleted file mode 100644
index bd1c450..0000000
--- a/spec/rcov.opts
+++ /dev/null
@@ -1,6 +0,0 @@
---exclude "spec,^/"
---sort coverage
---callsites
---xrefs
---profile
---text-summary
diff --git a/spec/spec.opts b/spec/spec.opts
deleted file mode 100644
index 90be10b..0000000
--- a/spec/spec.opts
+++ /dev/null
@@ -1,4 +0,0 @@
---colour
---loadby random
---format profile
---backtrace
diff --git a/tasks/spec.rake b/tasks/spec.rake
index 652b946..ba2b743 100644
--- a/tasks/spec.rake
+++ b/tasks/spec.rake
@@ -1,7 +1,8 @@
 spec_defaults = lambda do |spec|
   spec.pattern    = 'spec/**/*_spec.rb'
   spec.libs      << 'lib' << 'spec'
-  spec.spec_opts << '--options' << 'spec/spec.opts'
+  spec.spec_opts << '--loadby random'
+  spec.spec_opts << '-c' if RUBY_VERSION < '2.2'
 end
 
 begin