diff --git a/announcement.gemspec b/announcement.gemspec
index 62fa1ea..12d20fc 100644
--- a/announcement.gemspec
+++ b/announcement.gemspec
@@ -37,7 +37,7 @@ if old_gemfile_text != new_gemfile_text
   a = Thread.new do
     Thread.stop
     puts 'waiting'
-    system("bundle update")
+    %x[cd '#{ENV['PWD']}' && bundle update]
     puts 'test123'
   end
   sleep 0.5