diff --git a/src/Commands/core/SiteInstallCommands.php b/src/Commands/core/SiteInstallCommands.php
index 3e8c376bf3..064f980fcc 100644
--- a/src/Commands/core/SiteInstallCommands.php
+++ b/src/Commands/core/SiteInstallCommands.php
@@ -89,6 +89,8 @@ public function install(array $profile, $options = ['db-url' => self::REQ, 'db-p
                 $value = intval($value);
             } elseif ($value == 'NULL') {
                 $value = null;
+            } elseif (preg_match('/^\[.*\]$/', $value)) {
+                $value = explode(',', trim($value, '[]'));
             }
 
             $form_options[$key] = $value;