diff --git a/src/terra/Command/Environment/EnvironmentAdd.php b/src/terra/Command/Environment/EnvironmentAdd.php
index 5ad8013..67583bc 100644
--- a/src/terra/Command/Environment/EnvironmentAdd.php
+++ b/src/terra/Command/Environment/EnvironmentAdd.php
@@ -152,6 +152,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
             'path' => $path,
             'document_root' => '',
             'url' => '',
+            'port' => '',
             'version' => $version,
             'domains' => array(),
         );
@@ -173,6 +174,9 @@ protected function execute(InputInterface $input, OutputInterface $output)
             // Save current branch
             $environment['version'] = $environmentFactory->getRepo()->getCurrentBranch();
 
+            // Pick a port
+            $environment['port'] = $environmentFactory->getAvailablePort();
+
             // Save to registry.
             $this->getApplication()->getTerra()->getConfig()->saveEnvironment($environment);
             $this->getApplication()->getTerra()->getConfig()->save();
diff --git a/src/terra/Config.php b/src/terra/Config.php
index af276c0..c1c9596 100644
--- a/src/terra/Config.php
+++ b/src/terra/Config.php
@@ -82,6 +82,9 @@ public function getConfigTreeBuilder()
               ->scalarNode('url')
               ->isRequired(false)
               ->end()
+              ->scalarNode('port')
+              ->isRequired(false)
+              ->end()
               ->scalarNode('document_root')
               ->isRequired(true)
               ->end()
diff --git a/src/terra/Factory/EnvironmentFactory.php b/src/terra/Factory/EnvironmentFactory.php
index dc3399b..a8b74be 100644
--- a/src/terra/Factory/EnvironmentFactory.php
+++ b/src/terra/Factory/EnvironmentFactory.php
@@ -279,6 +279,9 @@ public function getDockerComposeArray()
     {
         $this->getConfig();
 
+        // Determine format for load port
+        $load_port = isset($this->environment->port) ? "{$this->environment->port}:80" : 80;
+
         $source_root = $this->environment->path;
 
         if (!empty($this->config['document_root'])) {
@@ -322,7 +325,7 @@ public function getDockerComposeArray()
                 '80/tcp',
             ),
             'ports' => array(
-                '80',
+                $load_port,
             ),
         );
         $compose['app'] = array(
@@ -713,4 +716,20 @@ public function writeTerraYml()
             return false;
         }
     }
+
+    /**
+     * Looks through config for available ports...
+     *
+     * Still figuring this out...
+     */
+    public function getAvailablePort()
+    {
+        $start = 50000;
+        $this->getConfig();
+        foreach ($this->config['apps'] as $app) {
+            foreach ($app['environments'] as $environment) {
+
+            }
+        }
+    }
 }