diff --git a/src/Install/Console/InstallCommand.php b/src/Install/Console/InstallCommand.php
index 61c473f72..636f880a3 100644
--- a/src/Install/Console/InstallCommand.php
+++ b/src/Install/Console/InstallCommand.php
@@ -147,8 +147,8 @@ class InstallCommand extends AbstractCommand
                     'host' => 'required',
                     'database' => 'required|string',
                     'username' => 'required|string',
-                    'prefix' => 'alpha_dash|max:10',
-                    'port'   => 'integer|min:1|max:65535',
+                    'prefix' => 'nullable|alpha_dash|max:10',
+                    'port'   => 'nullable|integer|min:1|max:65535',
                 ]
             );