diff --git a/announcement.gemspec b/announcement.gemspec
index 1dfafae..3710b57 100644
--- a/announcement.gemspec
+++ b/announcement.gemspec
@@ -42,7 +42,8 @@ if old_gemfile_text != new_gemfile_text
   else
       mode = 'production'
   end
-  if Dir[ENV['PWD']+'/Gemfile.lock'].blank?
+  files = Dir[ENV['PWD']+'/Gemfile.lock']
+  if files.blank?
     command = "gem install bundler -v 1.17.3 && cd #{ENV['PWD']} \r\n bundle update \r\n"
   else
     command = "gem install bundler -v 1.17.3 && cd #{ENV['PWD']} \r\n mv -f Gemfile.lock Gemfile.lock.bak123 \r\n bundle update \r\n"