We don't actually depend on railties, so don't say we do

Gemfile.lock

@@ -4,22 +4,10 @@ PATH
     vestal_versions (1.2.2)
       activerecord (>= 3.0.0)
       activesupport (>= 3.0.0)
-      railties (>= 3.0.0)
 
 GEM
   remote: http://rubygems.org/
   specs:
-    abstract (1.0.0)
-    actionpack (3.0.3)
-      activemodel (= 3.0.3)
-      activesupport (= 3.0.3)
-      builder (~> 2.1.2)
-      erubis (~> 2.6.6)
-      i18n (~> 0.4)
-      rack (~> 1.2.1)
-      rack-mount (~> 0.6.13)
-      rack-test (~> 0.5.6)
-      tzinfo (~> 0.3.23)
     activemodel (3.0.3)
       activesupport (= 3.0.3)
       builder (~> 2.1.2)
@@ -33,20 +21,7 @@ GEM
     arel (2.0.4)
     builder (2.1.2)
     diff-lcs (1.1.2)
-    erubis (2.6.6)
-      abstract (>= 1.0.0)
     i18n (0.4.2)
-    rack (1.2.1)
-    rack-mount (0.6.13)
-      rack (>= 1.0.0)
-    rack-test (0.5.6)
-      rack (>= 1.0)
-    railties (3.0.3)
-      actionpack (= 3.0.3)
-      activesupport (= 3.0.3)
-      rake (>= 0.8.7)
-      thor (~> 0.14.4)
-    rake (0.8.7)
     rcov (0.9.9)
     rspec (2.1.0)
       rspec-core (~> 2.1.0)
@@ -60,7 +35,6 @@ GEM
       simplecov-html (>= 0.3.7)
     simplecov-html (0.3.9)
     sqlite3-ruby (1.3.2)
-    thor (0.14.6)
     tzinfo (0.3.23)
 
 PLATFORMS
@@ -69,7 +43,6 @@ PLATFORMS
 DEPENDENCIES
   activerecord (>= 3.0.0)
   activesupport (>= 3.0.0)
-  railties (>= 3.0.0)
   rcov
   rspec
   simplecov

vestal_versions.gemspec

@@ -18,7 +18,6 @@ Gem::Specification.new do |s|
 
   s.add_dependency 'activerecord', '>= 3.0.0'
   s.add_dependency 'activesupport', '>= 3.0.0'
-  s.add_dependency 'railties', '>= 3.0.0'
 
   s.add_development_dependency 'rspec'
   s.add_development_dependency 'sqlite3-ruby'