diff --git a/README.md b/README.md
index 0e7f74e7..132f26f9 100644
--- a/README.md
+++ b/README.md
@@ -79,6 +79,12 @@ train = Train.create('winrm',
 require 'train'
 train = Train.create('docker', host: 'container_id...')
 ```
+You can use `user` option to connect with privileged user on non root user images.
+
+```ruby
+require 'train'
+train = Train.create('docker', host: 'container_id...', user: 'root')
+```
 
 **AWS**
 
diff --git a/lib/train/transports/docker.rb b/lib/train/transports/docker.rb
index 9b2cb54e..99a0cd60 100644
--- a/lib/train/transports/docker.rb
+++ b/lib/train/transports/docker.rb
@@ -88,7 +88,7 @@ def run_command_via_connection(cmd, &_data_handler)
       stdout, stderr, exit_status = @container.exec(
         [
           "/bin/sh", "-c", cmd
-        ]
+        ], user: @options[:user]
       )
       CommandResult.new(stdout.join, stderr.join, exit_status)
     rescue ::Docker::Error::DockerError => _