diff --git a/middleman.gemspec b/middleman.gemspec
index 022efaa0..140284cc 100644
--- a/middleman.gemspec
+++ b/middleman.gemspec
@@ -31,7 +31,7 @@ Gem::Specification.new do |s|
   s.add_runtime_dependency("yui-compressor", ["~> 0.9.0"])
   s.add_runtime_dependency("haml", [">= 3.1.0.alpha.147"])
   s.add_runtime_dependency("sass", [">= 3.1.0.alpha.218"])
-  s.add_runtime_dependency("compass", ["0.11.beta.2"])
+  s.add_runtime_dependency("compass", [">= 0.11.beta.2"])
   s.add_runtime_dependency("chunky_png", ["~> 0.12.0"])
   s.add_runtime_dependency("oily_png", ["~> 0.3.0"]) unless defined?(JRUBY_VERSION)
   s.add_runtime_dependency("json_pure", ["~> 1.4.0"])