diff --git a/spec/dummy/bin/bundle b/spec/dummy/bin/bundle
index 7ee2081..66e9889 100755
--- a/spec/dummy/bin/bundle
+++ b/spec/dummy/bin/bundle
@@ -1,3 +1,3 @@
-#!/usr/bin/env ruby2.2
+#!/usr/bin/env ruby
 ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../../Gemfile', __FILE__)
 load Gem.bin_path('bundler', 'bundle')
diff --git a/spec/dummy/bin/rails b/spec/dummy/bin/rails
index 792cba9..5191e69 100755
--- a/spec/dummy/bin/rails
+++ b/spec/dummy/bin/rails
@@ -1,4 +1,4 @@
-#!/usr/bin/env ruby2.2
+#!/usr/bin/env ruby
 APP_PATH = File.expand_path('../../config/application', __FILE__)
 require_relative '../config/boot'
 require 'rails/commands'
diff --git a/spec/dummy/bin/rake b/spec/dummy/bin/rake
index 9f4b6f9..1724048 100755
--- a/spec/dummy/bin/rake
+++ b/spec/dummy/bin/rake
@@ -1,4 +1,4 @@
-#!/usr/bin/env ruby2.2
+#!/usr/bin/env ruby
 require_relative '../config/boot'
 require 'rake'
 Rake.application.run
diff --git a/spec/dummy/bin/setup b/spec/dummy/bin/setup
index a242dbb..acdb2c1 100755
--- a/spec/dummy/bin/setup
+++ b/spec/dummy/bin/setup
@@ -1,4 +1,4 @@
-#!/usr/bin/env ruby2.2
+#!/usr/bin/env ruby
 require 'pathname'
 
 # path to your application root.