diff --git a/build/docker/README.md b/build/docker/README.md
index 2ae309b..3712653 100644
--- a/build/docker/README.md
+++ b/build/docker/README.md
@@ -3,8 +3,8 @@
 
 ### Available Containers
 
-* Ubuntu
-* Centos
+* Ubuntu - based on ubuntu:trusty (14.04)
+* Centos - based on centos:6.6
 
 ## Dependencies
 
@@ -15,11 +15,11 @@
 
 * Build
 
-	docker build -t thrift contrib/docker/ubuntu
+	docker build -t thrift build/docker/ubuntu
 
 	or
 
-	docker build -t thrift contrib/docker/centos
+	docker build -t thrift build/docker/centos
 
 * Run