diff --git a/Gemfile b/Gemfile
index eec06b7..0177738 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,6 +1,6 @@
 source 'https://rubygems.org'
 
-gem 'rake', '>= 0.9'
+gem 'rake', '>= 12.3.3'
 gem 'rdoc', '>= 2.4.2'
 
 platforms :jruby do
@@ -19,4 +19,4 @@ group :test do
   gem 'systemu'
 end
 
-gemspec
\ No newline at end of file
+gemspec