diff --git a/rubyipmi.gemspec b/rubyipmi.gemspec
index 733a74e..5732b96 100644
--- a/rubyipmi.gemspec
+++ b/rubyipmi.gemspec
@@ -26,6 +26,6 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'rspec'
   s.add_development_dependency 'rdoc', "~> 7.1"
   s.add_development_dependency 'bundler', ">= 2.0"
-  s.add_development_dependency 'highline', '>= 1.0', '< 3'
+  s.add_development_dependency 'highline', '>= 1.0', '< 4'
   s.add_development_dependency 'rake', '~> 13'
 end