diff --git a/lib/docker_manager/upgrader.rb b/lib/docker_manager/upgrader.rb
index 19ac8d4..8048942 100644
--- a/lib/docker_manager/upgrader.rb
+++ b/lib/docker_manager/upgrader.rb
@@ -264,7 +264,7 @@ class DockerManager::Upgrader
   end
 
   def unicorn_launcher_pid
-    `ps aux  | grep unicorn_launcher | grep -v sudo | grep -v grep | awk '{ print $2 }'`.strip.to_i
+    `ps aux | grep unicorn_launcher | grep -v sudo | grep -v grep | awk '{ print $2 }'`.strip.to_i
   end
 
   def unicorn_master_pid