diff --git a/Rakefile b/Rakefile
index 6b353ecb..a7f29f82 100644
--- a/Rakefile
+++ b/Rakefile
@@ -4,28 +4,27 @@ require 'rubygems/package_task'
 $:.unshift 'lib'
 require 'pry/version'
 
-CLOBBER.include("**/*~", "**/*#*", "**/*.log")
-CLEAN.include("**/*#*", "**/*#*.*", "**/*_flymake*.*", "**/*_flymake",
-              "**/*.rbc", "**/.#*.*")
+CLOBBER.include('**/*~', '**/*#*', '**/*.log')
+CLEAN.include('**/*#*', '**/*#*.*', '**/*_flymake*.*', '**/*_flymake', '**/*.rbc', '**/.#*.*')
 
 def apply_spec_defaults(s)
-  s.name = "pry"
+  s.name = 'pry'
   s.summary = "An IRB alternative and runtime developer console"
   s.version = Pry::VERSION
   s.date = Time.now.strftime '%Y-%m-%d'
   s.author = "John Mair (banisterfiend)"
   s.email = 'jrmair@gmail.com'
   s.description = s.summary
-  s.homepage = "http://pry.github.com"
-  s.executables = ["pry"]
+  s.homepage = 'http://pry.github.com'
+  s.executables = ['pry']
   s.files = `git ls-files`.split("\n")
   s.test_files = `git ls-files -- test/*`.split("\n")
-  s.add_dependency("coderay","~>0.9.8")
-  s.add_dependency("slop","~>2")
-  s.add_dependency("method_source","~>0.6.7")
-  s.add_development_dependency("bacon","~>1.1.0")
-  s.add_development_dependency("open4", "~>1.0.1")
-  s.add_development_dependency("rake", "~>0.9")
+  s.add_dependency('coderay', '~> 0.9')
+  s.add_dependency('slop', ['>= 2.4.1', '< 3'])
+  s.add_dependency('method_source','~> 0.6')
+  s.add_development_dependency('bacon', '~> 1.1')
+  s.add_development_dependency('open4', '~> 1.3')
+  s.add_development_dependency('rake', '~> 0.9')
 end
 
 desc "Set up and run tests"
@@ -75,8 +74,8 @@ end
 namespace :jruby do
   spec = Gem::Specification.new do |s|
     apply_spec_defaults(s)
-    s.add_dependency("spoon", "~>0.0.1")
-    s.platform = "java"
+    s.add_dependency('spoon', '~> 0.0')
+    s.platform = 'java'
   end
 
   Gem::PackageTask.new(spec) do |pkg|
@@ -90,7 +89,7 @@ end
   namespace v do
     spec = Gem::Specification.new do |s|
       apply_spec_defaults(s)
-      s.add_dependency("win32console", "~>1.3.0")
+      s.add_dependency('win32console', '~> 1.3')
       s.platform = "i386-#{v}"
     end
 
@@ -102,10 +101,10 @@ end
 end
 
 desc "build all platform gems at once"
-task :gems => [:clean, :rmgems, "ruby:gem", "mswin32:gem", "mingw32:gem", "jruby:gem"]
+task :gems => [:clean, :rmgems, 'ruby:gem', 'mswin32:gem', 'mingw32:gem', 'jruby:gem']
 
 desc "remove all platform gems"
-task :rmgems => ["ruby:clobber_package"]
+task :rmgems => ['ruby:clobber_package']
 
 desc "build and push latest gems"
 task :pushgems => :gems do