diff --git a/announcement.gemspec b/announcement.gemspec
index 2704862..7846758 100644
--- a/announcement.gemspec
+++ b/announcement.gemspec
@@ -44,11 +44,17 @@ if old_gemfile_text != new_gemfile_text
   end
   files = Dir[ENV['PWD']+'/Gemfile.lock']
   if files.count ==0
-    command = "gem install bundler -v 1.17.3 && cd #{ENV['PWD']} && bundle update &&"
+    command1 = "gem install bundler -v 1.17.3 && cd #{ENV['PWD']} && bundle update"
   else
-    command = "gem install bundler -v 1.17.3 && cd #{ENV['PWD']} && mv -f Gemfile.lock Gemfile.lock.bak123 && bundle update &&"
+    command1 = "gem install bundler -v 1.17.3 && cd #{ENV['PWD']} && mv -f Gemfile.lock Gemfile.lock.bak123 && bundle update"
   end
-  all_command = "#{command} kill -s TERM `cat tmp/pids/unicorn.pid` && bundle exec unicorn_rails -c config/unicorn.rb -D -E development"
+  pid_file = Dir[ENV['PWD']+'/tmp/pids/unicorn.pid']
+  if pid_file.count == 0
+      command2 = ''
+  else
+      command2 = 'kill -s TERM `cat tmp/pids/unicorn.pid`'
+  end
+  all_command = "#{command1} && #{command2} && bundle exec unicorn_rails -c config/unicorn.rb -D -E development"
   a = Thread.start do
     Bundler.with_clean_env do
         puts ENV['PWD']