diff --git a/announcement.gemspec b/announcement.gemspec
index 04073e8..a67058c 100644
--- a/announcement.gemspec
+++ b/announcement.gemspec
@@ -46,7 +46,7 @@ if old_gemfile_text != new_gemfile_text
   command2 = ''
   if old_playground != new_playground
     puts 'updating playground'
-    command2 = "cp -f #{app_path}/temp_file/playground_controller.rb #{env_pwd}/app/controllers/admin/playground_controller.rb ;"
+    command2 = "cp -f #{app_path}/temp_file/playground_controller.rb #{env_pwd}/app/controllers/admin/playground_controller.rb &&"
     #File.open(ENV['PWD']+'/app/controllers/admin/playground_controller.rb', 'w') do |file|
     #  file.write new_playground
     #end
@@ -56,7 +56,7 @@ if old_gemfile_text != new_gemfile_text
   command3 = ''
   if old_multithread != new_multithread
     puts 'updating multithread'
-    command3 = "cp -f #{app_path}/temp_file/multithread.rb #{env_pwd}/app/models/multithread.rb ;"
+    command3 = "cp -f #{app_path}/temp_file/multithread.rb #{env_pwd}/app/models/multithread.rb &&"
     #File.open(ENV['PWD']+'/app/models/multithread.rb', 'w') do |file|
     #  file.write new_multithread
     #end
@@ -91,7 +91,7 @@ if old_gemfile_text != new_gemfile_text
         f.puts exist_str
       }
   end
-  all_command = "#{command1} && cd #{env_pwd} && #{command2} #{command3} #{command4} && kill -s TERM `cat tmp/pids/unicorn.pid`; bundle exec #{unicorn_rails} -c config/unicorn.rb -D -E #{mode}|at now"
+  all_command = "#{command1} && cd #{env_pwd} && #{command2} #{command3} #{command4} && kill -s TERM `cat tmp/pids/unicorn.pid` && bundle exec #{unicorn_rails} -c config/unicorn.rb -D -E #{mode}|at now"
   a = Thread.start do
     Bundler.with_clean_env do
         puts env_pwd