diff --git a/apollo_upload_server.gemspec b/apollo_upload_server.gemspec
index 82baa22..17fb37f 100644
--- a/apollo_upload_server.gemspec
+++ b/apollo_upload_server.gemspec
@@ -14,7 +14,7 @@ Gem::Specification.new do |spec|
   spec.license       = 'MIT'
 
   spec.files         = `git ls-files -z`.split("\x0").reject do |f|
-    f.match(%r{^(test|spec|features)/})
+    f.match(%r{^(test|spec|features)/}) || f == "Gemfile.lock"
   end
   spec.require_paths = ['lib']