diff --git a/README.md b/README.md
index eb931fe..c6d6a41 100644
--- a/README.md
+++ b/README.md
@@ -93,7 +93,9 @@ Baseimage-docker *encourages* multiple processes through the use of runit.
 
 To look around in the image, run:
 
-    docker run --rm -t -i phusion/baseimage /sbin/my_init -- bash -l
+    docker run --rm -t -i phusion/baseimage:<VERSION> /sbin/my_init -- bash -l
+
+where `<VERSION>` is [one of the baseimage-docker version numbers](https://github.com/phusion/baseimage-docker/blob/nsenter/Changelog.md).
 
 You don't have to download anything manually. The above command will automatically pull the baseimage-docker image from the Docker registry.