diff --git a/awesome_print.gemspec b/awesome_print.gemspec
index 9ba912f..a2f117f 100644
--- a/awesome_print.gemspec
+++ b/awesome_print.gemspec
@@ -24,10 +24,10 @@ Gem::Specification.new do |s|
   s.require_paths = ['lib']
 
   s.add_development_dependency 'rspec',  '>= 3.0.0'
-  s.add_development_dependency 'appraisal'
+  s.add_development_dependency 'appraisal', '= 2.0.0'
   s.add_development_dependency 'fakefs', '>= 0.2.1'
   s.add_development_dependency 'sqlite3'
   s.add_development_dependency 'nokogiri', '>= 1.6.5'
-  s.add_development_dependency 'simplecov'
-  s.add_development_dependency 'codeclimate-test-reporter'
+  # s.add_development_dependency 'simplecov'
+  # s.add_development_dependency 'codeclimate-test-reporter'
 end
diff --git a/gemfiles/mongoid_4.0.gemfile b/gemfiles/mongoid_4.0.gemfile
index c899518..5a038c1 100644
--- a/gemfiles/mongoid_4.0.gemfile
+++ b/gemfiles/mongoid_4.0.gemfile
@@ -4,4 +4,4 @@ source "https://rubygems.org"
 
 gem "mongoid", "~> 4.0.0"
 
-gemspec path: "../"
+gemspec :path => "../"
diff --git a/gemfiles/mongoid_5.0.gemfile b/gemfiles/mongoid_5.0.gemfile
index 4404aeb..225d377 100644
--- a/gemfiles/mongoid_5.0.gemfile
+++ b/gemfiles/mongoid_5.0.gemfile
@@ -4,4 +4,4 @@ source "https://rubygems.org"
 
 gem "mongoid", "~> 5.0.0"
 
-gemspec path: "../"
+gemspec :path => "../"
diff --git a/gemfiles/mongoid_6.0.gemfile b/gemfiles/mongoid_6.0.gemfile
index dc461ad..0eea277 100644
--- a/gemfiles/mongoid_6.0.gemfile
+++ b/gemfiles/mongoid_6.0.gemfile
@@ -4,4 +4,4 @@ source "https://rubygems.org"
 
 gem "mongoid", "~> 6.0.0"
 
-gemspec path: "../"
+gemspec :path => "../"
diff --git a/gemfiles/rails_4.2.gemfile b/gemfiles/rails_4.2.gemfile
index aa2a7ea..2fb73f1 100644
--- a/gemfiles/rails_4.2.gemfile
+++ b/gemfiles/rails_4.2.gemfile
@@ -3,6 +3,6 @@
 source "https://rubygems.org"
 
 gem "rails", "~> 4.2.0"
-gem "mime-types", "2.6.2", platforms: :ruby_19
+gem "mime-types", "2.6.2", :platforms => :ruby_19
 
-gemspec path: "../"
+gemspec :path => "../"
diff --git a/gemfiles/rails_5.0.gemfile b/gemfiles/rails_5.0.gemfile
index 4c5cb4b..0588df0 100644
--- a/gemfiles/rails_5.0.gemfile
+++ b/gemfiles/rails_5.0.gemfile
@@ -4,4 +4,4 @@ source "https://rubygems.org"
 
 gem "rails", ">= 5.0.0", "< 5.1"
 
-gemspec path: "../"
+gemspec :path => "../"
diff --git a/gemfiles/rails_5.1.gemfile b/gemfiles/rails_5.1.gemfile
index d974e25..c78e558 100644
--- a/gemfiles/rails_5.1.gemfile
+++ b/gemfiles/rails_5.1.gemfile
@@ -4,4 +4,4 @@ source "https://rubygems.org"
 
 gem "rails", ">= 5.1.0", "< 5.2"
 
-gemspec path: "../"
+gemspec :path => "../"
diff --git a/gemfiles/rails_5.2.gemfile b/gemfiles/rails_5.2.gemfile
index a3348a9..00c0b13 100644
--- a/gemfiles/rails_5.2.gemfile
+++ b/gemfiles/rails_5.2.gemfile
@@ -4,4 +4,4 @@ source "https://rubygems.org"
 
 gem "rails", ">= 5.2.0", "< 5.3"
 
-gemspec path: "../"
+gemspec :path => "../"