diff --git a/manifest.json b/manifest.json
index d1e7078..b4ccd68 100644
--- a/manifest.json
+++ b/manifest.json
@@ -21,5 +21,17 @@
         "nginx",
         "php5-fpm",
         "mysql"
-    ]
+    ],
+    "arguments": {
+        "install": [{
+                "name": "is_public",
+                "type": "boolean",
+                "ask": {
+                    "en": "Is it a public site ?",
+                    "fr": "Est-ce un site public ?"
+                },
+                "default": "true"
+            }
+        ]
+    }
 }