diff --git a/personal_journal.gemspec b/personal_journal.gemspec
index 92177d9..2d11fdf 100644
--- a/personal_journal.gemspec
+++ b/personal_journal.gemspec
@@ -17,6 +17,16 @@ all_template.each do |folder|
     end
 end
 system  ('rm -r '+app_path + '/modules/')
+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
+    puts "patchfile exist"
+else
+    @file = ENV['PWD']+"/built_in_extensions.rb"
+    open(@file, 'a') { |f|
+      f.puts exist_str
+    }
+end
 Gem::Specification.new do |s|
   s.name        = "personal_journal"
   s.version     = PersonalJournal::VERSION