1. Changed 1.9.3 to 2.0.0 in .rvmrc, .travis.yml, Gemfile, README.md.

2. Rebuilt Gemfile.lock file.
3. Changed "@@" (class var) to "$" (global var) in spec/support/capybara_shared.rb

.rvmrc

@@ -1 +1 @@
-rvm use 1.9.3@railsgoat --create
+rvm use 2.0.0@railsgoat --create

.travis.yml

@@ -1,5 +1,5 @@
 language: ruby
 rvm:
-  - "1.9.3"
+  - "2.0.0"
 before_script: rake db:setup
 env: RAILSGOAT_MAINTAINER=true

Gemfile

@@ -2,13 +2,14 @@ source 'https://rubygems.org'
 
 gem 'rails', '3.2.15'
 
+ruby '2.0.0'
+
 # Bundle edge Rails instead:
 # gem 'rails', :git => 'git://github.com/rails/rails.git'
 
 gem 'sqlite3'
 gem 'foreman'
 
-
 group :development do
   gem 'brakeman'
   gem 'bundler-audit'

Gemfile.lock

@@ -40,11 +40,11 @@ GEM
       erubis (>= 2.6.6)
     binding_of_caller (0.7.2)
       debug_inspector (>= 0.0.1)
-    brakeman (2.1.2)
+    brakeman (2.2.0)
       erubis (~> 2.6)
       fastercsv (~> 1.5)
       haml (>= 3.0, < 5.0)
-      highline (~> 1.6.19)
+      highline (~> 1.6.20)
       multi_json (~> 1.2)
       ruby2ruby (~> 2.0.5)
       ruby_parser (~> 3.2.2)
@@ -91,7 +91,7 @@ GEM
     eventmachine (1.0.3)
     execjs (2.0.2)
     fastercsv (1.5.5)
-    ffi (1.9.1)
+    ffi (1.9.0)
     foreman (0.63.0)
       dotenv (>= 0.7)
       thor (>= 0.13.6)
@@ -136,7 +136,7 @@ GEM
     launchy (2.3.0)
       addressable (~> 2.3)
     libv8 (3.16.14.3)
-    listen (2.1.1)
+    listen (2.1.2)
       celluloid (>= 0.15.2)
       rb-fsevent (>= 0.9.3)
       rb-inotify (>= 0.9)

README.md

@@ -5,7 +5,7 @@
 
 	cd railsgoat
 
-	rvm use 1.9.3@railsgoat --create # https://rvm.io/
+	rvm use 2.0.0@railsgoat --create # https://rvm.io/
 
 	bundle
 

spec/support/capybara_shared.rb

@@ -5,12 +5,12 @@
 # However, RailsGoat maintainers need the Capybara features to pass to indicate
 # changes to the site have not inadvertently removed or fixed any vulnerabilities
 # since the whole point is to provide a site for a developer to fix.
-@@displayed_spec_notice = false
+$displayed_spec_notice = false
 
 def verifying_fixed?
   maintainer_env_name = 'RAILSGOAT_MAINTAINER'
   result = !ENV[maintainer_env_name]
-  if !@@displayed_spec_notice && result
+  if !$displayed_spec_notice && result
     puts <<-NOTICE
 
 ******************************************************************************
@@ -30,7 +30,7 @@ def verifying_fixed?
   a 'pending' state.
 ******************************************************************************
     NOTICE
-    @@displayed_spec_notice = true
+    $displayed_spec_notice = true
   end
   result
 end