diff --git a/lib/docker_container_pool.rb b/lib/docker_container_pool.rb
index 18509669..96ac0a66 100644
--- a/lib/docker_container_pool.rb
+++ b/lib/docker_container_pool.rb
@@ -1,6 +1,6 @@
 require 'concurrent/future'
 require 'concurrent/timer_task'
-require 'concurrent/utilities'
+
 
 class DockerContainerPool