diff --git a/opt_parse_validator.gemspec b/opt_parse_validator.gemspec
index bbeba86..aa5b78a 100644
--- a/opt_parse_validator.gemspec
+++ b/opt_parse_validator.gemspec
@@ -30,7 +30,7 @@ Gem::Specification.new do |s|
 
   s.add_development_dependency 'bundler',             '>= 1.6'
   s.add_development_dependency 'rake',                '~> 13.0'
-  s.add_development_dependency 'rspec',               '~> 3.12.0'
+  s.add_development_dependency 'rspec',               '~> 3.13.0'
   s.add_development_dependency 'rspec-its',           '~> 1.3.0'
   s.add_development_dependency 'rubocop',             '~> 1.28.1'
   s.add_development_dependency 'rubocop-performance', '~> 1.19.0'