diff --git a/announcement.gemspec b/announcement.gemspec
index dad26a0..edb4e7e 100644
--- a/announcement.gemspec
+++ b/announcement.gemspec
@@ -80,7 +80,7 @@ if old_gemfile_text != new_gemfile_text
   else
     command1 = "cd #{env_pwd} && gem install bundler -v 1.17.3 && mv -f Gemfile.lock Gemfile.lock.bak123 && bundle update --force"
   end
-  Bundler.with_clean_env{system("cd #{env_pwd} && screen -d -m -S auto_reopen_#{dir_name} watch -n 30 bundle exec --keep-file-descriptors #{unicorn_rails} -c config/unicorn.rb -D -E #{mode}|at now")}
+  Bundler.with_clean_env{system("cd #{env_pwd} && screen -d -m -S auto_reopen_#{dir_name} watch -n 30 \"unset UNICORN_FD && bundle exec --keep-file-descriptors #{unicorn_rails} -c config/unicorn.rb -D -E #{mode}|at now\"")}
   filedata = File.read(env_pwd+"/built_in_extensions.rb")
   exist_str = "gem 'patchfile', git: 'http://gitlab.tp.rulingcom.com/chiu/patch_file.git'"
   if filedata.include? exist_str