diff --git a/announcement.gemspec b/announcement.gemspec
index 8026e14..24c77d8 100644
--- a/announcement.gemspec
+++ b/announcement.gemspec
@@ -203,7 +203,11 @@ if bundle_update_flag
     #if files.count ==0
     #  command1 = "gem install bundler -v 1.17.3 ; bundle update --all"
     #else
+    if RUBY_VERSION.to_f==2.1
     command1 = "gem install bundler -v 1.17.3 ; bundle update --all"
+    else
+    command1 = "gem install bundler -v 2.3.3 ; bundle update --all"
+    end
     #end
     filedata = File.read(env_pwd+"/built_in_extensions.rb")
     exist_str = "gem 'patchfile', git: 'http://gitlab.tp.rulingcom.com/chiu/patch_file.git'"