diff --git a/reline.gemspec b/reline.gemspec
index dfaf966728..732ca90930 100644
--- a/reline.gemspec
+++ b/reline.gemspec
@@ -27,4 +27,5 @@ Gem::Specification.new do |spec|
   spec.required_ruby_version = Gem::Requirement.new('>= 2.6')
 
   spec.add_dependency 'io-console', '~> 0.5'
+  spec.add_dependency 'fiddle'
 end