Gemfile in puppet-debugger-0.4.4 vs Gemfile in puppet-debugger-0.5.1

@@ -1,7 +1,7 @@
 source "http://rubygems.org"
-gem 'puppet', ENV['PUPPET_GEM_VERSION'] || ">= 3.8"
+gem 'puppet', ENV['PUPPET_GEM_VERSION'] || "~> 4.9.0"
 gem 'facterdb', ">= 0.3.8"
 gem 'awesome_print', "~> 1.6"
 
 group :test do
   # ruby versions prior to 2.0 cannot install json_pure 2.0.2+
@@ -10,14 +10,12 @@
   gem "rspec"
   gem "bundler"
   gem "simplecov", ">= 0"
   gem 'rake'
   gem 'release_me'
+  gem 'pry'
 end
 
 group :validate do
   gem 'rubocop'
 end
 
-group :development do
-  gem 'pry'
-end