diff --git a/pry.gemspec b/pry.gemspec
index 8dcc8f1d..cfe56b06 100644
--- a/pry.gemspec
+++ b/pry.gemspec
@@ -1,4 +1,3 @@
-# -*- encoding: utf-8 -*-
 require File.expand_path('../lib/pry/version', __FILE__)
 
 Gem::Specification.new do |s|
@@ -29,6 +28,6 @@ Gem::Specification.new do |s|
   s.files         = `git ls-files bin lib *.md LICENSE`.split("\n")
 
   s.add_dependency 'coderay',       '~> 1.1.0'
-  s.add_dependency 'method_source', '~> 0.9.0'
+  s.add_dependency 'method_source', '>= 0.9.1'
   s.add_development_dependency 'bundler', '~> 1.0'
 end