diff --git a/sinatra-contrib/lib/sinatra/contrib/version.rb b/sinatra-contrib/lib/sinatra/contrib/version.rb
index f2bf1839..07df68c5 100644
--- a/sinatra-contrib/lib/sinatra/contrib/version.rb
+++ b/sinatra-contrib/lib/sinatra/contrib/version.rb
@@ -4,7 +4,7 @@ module Sinatra
       VERSION
     end
 
-    SIGNATURE = [1, 3, 1]
+    SIGNATURE = [1, 4, 0]
     VERSION   = SIGNATURE.join('.')
 
     VERSION.extend Comparable
diff --git a/sinatra-contrib/sinatra-contrib.gemspec b/sinatra-contrib/sinatra-contrib.gemspec
index 91a005ed..2cde8488 100644
--- a/sinatra-contrib/sinatra-contrib.gemspec
+++ b/sinatra-contrib/sinatra-contrib.gemspec
@@ -1,7 +1,8 @@
 # Run `rake sinatra-contrib.gemspec` to update the gemspec.
+require File.expand_path('../lib/sinatra/contrib/version', __FILE__)
 Gem::Specification.new do |s|
   s.name        = "sinatra-contrib"
-  s.version     = "1.4.0"
+  s.version     = Sinatra::Contrib::VERSION
   s.description = "Collection of useful Sinatra extensions"
   s.homepage    = "http://github.com/sinatra/sinatra-contrib"
   s.summary     = s.description