diff --git a/Gemfile b/Gemfile
index 89cd72b3..f07e274f 100644
--- a/Gemfile
+++ b/Gemfile
@@ -9,10 +9,10 @@ group :development do
   gem "bundler"
   gem "rake", ">= 10.5"
   gem "RedCloth", RUBY_PLATFORM == 'java' ? "= 4.2.9" : ">= 4.0.3"
-  gem "term-ansicolor", "~> 1.3.2"
+  gem "term-ansicolor", ">= 1.3.2"
   gem 'tins', '>= 1.6.0'
-  gem "shoulda-context", "= 1.2.1"
+  gem "shoulda-context", ">= 1.2.1"
   gem "test-unit"
-  gem "json", "~> 1.8" if RUBY_VERSION < '1.9'
-  gem "rdoc", "~> 4.2.2"
+  gem "json", ">= 1.8" if RUBY_VERSION < '1.9'
+  gem "rdoc", ">= 4.2.2"
 end