diff --git a/lib/puppet-syntax/hiera.rb b/lib/puppet-syntax/hiera.rb
index 50400e2..af55fb9 100644
--- a/lib/puppet-syntax/hiera.rb
+++ b/lib/puppet-syntax/hiera.rb
@@ -70,7 +70,7 @@ def check(filelist)
 
       errors = []
 
-      yamlargs = Psych::VERSION >= '4.0' ? { aliases: true } : {}
+      yamlargs = (Psych::VERSION >= '4.0') ? { aliases: true } : {}
 
       filelist.each do |hiera_file|
         begin
diff --git a/puppet-syntax.gemspec b/puppet-syntax.gemspec
index 45f895e..211d37b 100644
--- a/puppet-syntax.gemspec
+++ b/puppet-syntax.gemspec
@@ -24,5 +24,5 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'pry'
   spec.add_development_dependency 'rb-readline'
 
-  spec.add_development_dependency 'voxpupuli-rubocop', '~> 1.4.0'
+  spec.add_development_dependency 'voxpupuli-rubocop', '~> 2.0.0'
 end