diff --git a/docker/manager.rb b/docker/manager.rb
index <HASH>..<HASH> 100644
--- a/docker/manager.rb
+++ b/docker/manager.rb
@@ -13,6 +13,7 @@ module Docker
       2.3.8
       2.4.5
       2.5.3
+      2.6.0
       head
     ].freeze
Add ruby <I> to the build matrix