diff --git a/lib/cover_me/config.rb b/lib/cover_me/config.rb
index 7726392..0a1ddbb 100644
--- a/lib/cover_me/config.rb
+++ b/lib/cover_me/config.rb
@@ -23,7 +23,7 @@ def set_defaults # :nodoc:
           Configatron::Delayed.new{defined?(Rails) ? Rails.root.to_s : Dir.pwd})
         c.results.set_default(:store, Configatron::Delayed.new {File.join(CoverMe.config.project.root, 'coverage.data')})
         c.set_default(:file_pattern, Configatron::Delayed.new do
-          /(#{CoverMe.config.project.root}\/app\/.+\.rb|#{CoverMe.config.project.root}\/lib\/.+\.rb)/i
+          /(#{CoverMe.config.project.root}\/app\/.+\.rb|#{CoverMe.config.project.root}\/lib\/.+\.rb|#{CoverMe.config.project.root}\/vendor\/engines\/.+\/app\/.+\.rb)/i
         end)
         
         c.proximity.set_default(:near, 90)
@@ -47,4 +47,4 @@ def set_defaults # :nodoc:
     
   end
   
-end
\ No newline at end of file
+end