1 files changed, 1 insertions, 1 deletions
diff --git a/Rakefile b/Rakefile
index fed7f8e..a851d63 100644
--- a/Rakefile
+++ b/Rakefile
@@ -89,7 +89,7 @@ if defined?(Gem) and defined?(Gem::PackageTask)
 
     s.require_path = 'lib'
     s.add_development_dependency 'rake'
-    s.add_development_dependency 'test-unit', '~> 2.0'
+    s.add_development_dependency 'test-unit', '>= 2.0', '< 4.0'
 
     s.extra_rdoc_files << 'README.md'
     s.rdoc_options <<