diff --git a/.sync.yml b/.sync.yml
index 0db3ba7..72ea373 100644
--- a/.sync.yml
+++ b/.sync.yml
@@ -5,6 +5,6 @@ spec/spec_helper.rb:
   allow_deprecations: true
 Gemfile:
   optional:
-    ':default':
+    ':development':
       - gem: hocon
         version: '~> 1.1'
diff --git a/Gemfile b/Gemfile
index 3d4cf69..5be7287 100644
--- a/Gemfile
+++ b/Gemfile
@@ -47,6 +47,7 @@ group :development do
   gem 'rubocop-rspec', '~> 1.6',            :require => false if Gem::Version.new(RUBY_VERSION) >= Gem::Version.new('2.3.0')
   gem 'pry',                                :require => false
   gem 'json_pure', '<= 2.0.1',              :require => false if Gem::Version.new(RUBY_VERSION) < Gem::Version.new('2.0.0')
+  gem 'hocon', '~> 1.1',                    :require => false
 end
 
 group :system_tests do
@@ -61,10 +62,6 @@ group :system_tests do
   gem 'beaker-hostgenerator', *location_for(ENV['BEAKER_HOSTGENERATOR_VERSION'])
 end
 
-group :default do
-  gem 'hocon', '~> 1.1', :require => false
-end
-
 gem 'puppet', *location_for(ENV['PUPPET_GEM_VERSION'])
 
 # Only explicitly specify Facter/Hiera if a version has been specified.