diff --git a/Gemfile b/Gemfile
index 9d54627..bcf035d 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,3 +2,6 @@ source :rubygems
 
 gemspec
 
+gem "rcov", :platforms => :mri_18
+gem "erubis", "~> 2.7"
+