--- expression_parser.gemspec~	2013-03-18 15:01:49.000000000 +0000
+++ expression_parser.gemspec	2021-10-06 16:32:34.999000000 +0000
@@ -23,5 +23,5 @@ spec = Gem::Specification.new do |s|
   s.add_development_dependency 'rspec'
   s.add_development_dependency 'rake'
   s.add_development_dependency 'rdoc'
-  s.add_development_dependency(RUBY_VERSION =~ /^1\.9/ ? "simplecov" : "rcov")
+  s.add_development_dependency(Gem::Version.new(RUBY_VERSION) > Gem::Version.new("1.9") ? "simplecov" : "rcov")
 end