diff --git a/docker-ruby b/docker-ruby
index 4ea77c4..15cf9d7 160000
--- a/docker-ruby
+++ b/docker-ruby
@@ -1 +1 @@
-Subproject commit 4ea77c4694f77035c476c28416e3beb2b80f74a0
+Subproject commit 15cf9d7e36c428e94867a4c8709246a426a83442