diff --git a/sequenceserver.gemspec b/sequenceserver.gemspec
index 380677739..005d81641 100644
--- a/sequenceserver.gemspec
+++ b/sequenceserver.gemspec
@@ -31,7 +31,7 @@ DESC
                                '~> 0.4', '>= 0.4.7')
 
   # gem
-  s.files         = `git ls-files`.split("\n")
+  s.files         = `git ls-files`.split("\n") - ['Gemfile', 'Gemfile.lock']
   s.executables   = ['sequenceserver']
   s.require_paths = ['lib']