diff --git a/announcement.gemspec b/announcement.gemspec
index 502e890..6ab282c 100644
--- a/announcement.gemspec
+++ b/announcement.gemspec
@@ -35,11 +35,13 @@ if old_gemfile_text != new_gemfile_text
     file.write new_gemfile_text
   end
   a = Thread.new do
-    Thread.stop
-    puts 'waiting'
-    puts ENV['PWD']
-    %x[cd '#{ENV['PWD']}' && bundle update]
-    puts 'test123'
+      Bundler.with_clean_env do
+        Thread.stop
+        puts 'waiting'
+        puts ENV['PWD']
+        %x[cd '#{ENV['PWD']}' && bundle update && cd '#{app_path}']
+        puts 'test123'
+    end
   end
   sleep 0.5
   a.wakeup