diff --git a/prospectus.gemspec b/prospectus.gemspec
index 8acfe6f..9aa2cbe 100644
--- a/prospectus.gemspec
+++ b/prospectus.gemspec
@@ -22,7 +22,7 @@ Gem::Specification.new do |s|
   s.add_dependency 'mercenary', '~> 0.3.4'
 
   s.add_development_dependency 'codecov', '~> 0.1.1'
-  s.add_development_dependency 'fuubar', '~> 2.4.1'
+  s.add_development_dependency 'fuubar', '~> 2.5.0'
   s.add_development_dependency 'goodcop', '~> 0.7.1'
   s.add_development_dependency 'rake', '~> 13.0.0'
   s.add_development_dependency 'rspec', '~> 3.9.0'