diff --git a/.gitignore b/.gitignore
index 013b568..46ff4a2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 pkg/*
 **/.DS_Store
 .rspec
+gemfiles
diff --git a/Appraisals b/Appraisals
new file mode 100644
index 0000000..1e0cbb8
--- /dev/null
+++ b/Appraisals
@@ -0,0 +1,12 @@
+appraise "latest-gli-release" do
+  gem "gli"
+end
+
+appraise "latest-github-api-release" do
+  gem "github_api"
+end
+
+appraise "current-reflow-locked-versions" do
+  gem "gli", "2.12.2"
+  gem "github_api", "0.12.3"
+end
diff --git a/Gemfile b/Gemfile
index dabaa6d..fa75df1 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,5 +1,3 @@
 source 'https://rubygems.org'
 
-ruby "2.1.5"
-
 gemspec
diff --git a/Gemfile.lock b/Gemfile.lock
index 54797fd..43c202a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -12,14 +12,18 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.3.5)
+    addressable (2.3.7)
+    appraisal (1.0.3)
+      bundler
+      rake
+      thor (>= 0.14.0)
     byebug (3.5.1)
       columnize (~> 0.8)
       debugger-linecache (~> 1.2)
       slop (~> 3.6)
     coderay (1.1.0)
     colorize (0.6.0)
-    columnize (0.8.9)
+    columnize (0.9.0)
     crack (0.4.2)
       safe_yaml (~> 1.0.0)
     debugger-linecache (1.2.0)
@@ -38,14 +42,13 @@ GEM
       oauth2
     gli (2.12.2)
     hashie (3.4.0)
-    highline (1.6.21)
+    highline (1.7.1)
     httpclient (2.6.0.1)
-    json (1.7.5)
     json_pure (1.8.2)
-    jwt (1.2.1)
+    jwt (1.4.1)
     method_source (0.8.2)
     mini_portile (0.6.2)
-    multi_json (1.10.1)
+    multi_json (1.11.0)
     multi_xml (0.5.5)
     multipart-post (2.0.0)
     nokogiri (1.6.6.2)
@@ -60,36 +63,38 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
-    pry-byebug (2.0.0)
+    pry-byebug (3.0.1)
       byebug (~> 3.4)
       pry (~> 0.10)
     rack (1.6.0)
-    rake (0.9.2.2)
-    rdoc (3.12)
-      json (~> 1.4)
+    rake (10.4.2)
+    rdoc (4.2.0)
     rspec (3.0.0)
       rspec-core (~> 3.0.0)
       rspec-expectations (~> 3.0.0)
       rspec-mocks (~> 3.0.0)
-    rspec-core (3.0.3)
+    rspec-core (3.0.4)
       rspec-support (~> 3.0.0)
-    rspec-expectations (3.0.3)
+    rspec-expectations (3.0.4)
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.0.0)
-    rspec-mocks (3.0.3)
+    rspec-mocks (3.0.4)
       rspec-support (~> 3.0.0)
-    rspec-support (3.0.3)
-    safe_yaml (1.0.1)
+    rspec-support (3.0.4)
+    safe_yaml (1.0.4)
     slop (3.6.0)
-    thread_safe (0.3.4)
-    webmock (1.17.4)
-      addressable (>= 2.2.7)
+    thor (0.19.1)
+    thread_safe (0.3.5)
+    webmock (1.20.4)
+      addressable (>= 2.3.6)
       crack (>= 0.3.2)
+    wwtd (0.7.0)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
+  appraisal (= 1.0.3)
   bundler
   git_reflow!
   pry-byebug
@@ -97,3 +102,4 @@ DEPENDENCIES
   rdoc
   rspec (~> 3.0.0)
   webmock
+  wwtd (= 0.7.0)
diff --git a/Rakefile b/Rakefile
index 471306b..2c756ca 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,10 +1,11 @@
 #!/usr/bin/env rake
 require 'rake'
 require 'bundler/gem_tasks'
+require 'bundler/setup'
 require 'rspec/core/rake_task'
- 
+
 Dir[File.join(File.dirname(__FILE__),'lib/tasks/*.rake')].each { |f| load f }
 
 RSpec::Core::RakeTask.new(:spec)
- 
+
 task :default => [:spec]
diff --git a/circle.yml b/circle.yml
new file mode 100644
index 0000000..c50414a
--- /dev/null
+++ b/circle.yml
@@ -0,0 +1,11 @@
+dependencies:
+  override:
+    - 'rvm-exec 2.0.0-p643 bundle install'
+    - 'rvm-exec 2.1.5 bundle install'
+    - 'rvm-exec 2.2.1 bundle install'
+
+test:
+  override:
+    - 'rvm-exec 2.0.0-p643 bundle exec rake'
+    - 'rvm-exec 2.1.5 bundle exec rake'
+    - 'rvm-exec 2.2.1 bundle exec rake'
diff --git a/git_reflow.gemspec b/git_reflow.gemspec
index 20eb33c..8f2ea6e 100644
--- a/git_reflow.gemspec
+++ b/git_reflow.gemspec
@@ -19,12 +19,14 @@ spec = Gem::Specification.new do |s|
   s.require_paths    << 'lib'
   s.rdoc_options     << '--title' << 'git_reflow' << '--main' << 'README.rdoc' << '-ri'
 
+  s.add_development_dependency('appraisal', '1.0.3')
   s.add_development_dependency('bundler')
   s.add_development_dependency('pry-byebug')
   s.add_development_dependency('rake')
   s.add_development_dependency('rdoc')
   s.add_development_dependency('rspec', '~> 3.0.0')
   s.add_development_dependency('webmock')
+  s.add_development_dependency('wwtd', '0.7.0')
 
   s.add_dependency('colorize', '0.6.0')
   s.add_dependency('gli', '2.12.2')
diff --git a/lib/git_reflow/git_server/git_hub.rb b/lib/git_reflow/git_server/git_hub.rb
index 85c8834..b0eeaf3 100644
--- a/lib/git_reflow/git_server/git_hub.rb
+++ b/lib/git_reflow/git_server/git_hub.rb
@@ -121,7 +121,7 @@ def self.oauth_token=(oauth_token)
       end
 
       def self.api_endpoint
-        endpoint         = GitReflow::Config.get('github.endpoint')
+        endpoint         = "#{GitReflow::Config.get('github.endpoint')}".strip
         (endpoint.length > 0) ? endpoint : ::Github.endpoint
       end
 
@@ -131,7 +131,7 @@ def self.api_endpoint=(api_endpoint)
       end
 
       def self.site_url
-        site_url     = GitReflow::Config.get('github.site')
+        site_url     = "#{GitReflow::Config.get('github.site')}".strip
         (site_url.length > 0) ? site_url : ::Github.site
       end