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-rw-r--r--rainbows.gemspec2
1 files changed, 1 insertions, 1 deletions
diff --git a/rainbows.gemspec b/rainbows.gemspec
index 0cecf45..9b5ff42 100644
--- a/rainbows.gemspec
+++ b/rainbows.gemspec
@@ -28,7 +28,7 @@ Gem::Specification.new do |s|
   s.add_dependency(%q<kgio>, ['~> 2.4'])
 
   # we need Unicorn for the HTTP parser and process management
-  s.add_dependency(%q<unicorn>, ["~> 3.7"])
+  s.add_dependency(%q<unicorn>, ["~> 4.0"])
   s.add_development_dependency(%q<isolate>, "~> 3.1")
   s.add_development_dependency(%q<wrongdoc>, "~> 1.5")