diff --git a/manifest.json b/manifest.json
index fc8ebe1..f6c7be6 100644
--- a/manifest.json
+++ b/manifest.json
@@ -63,6 +63,7 @@
             },
             {
                 "name": "language",
+                "type": "string",
                 "ask": {
                     "en": "Choose the application language",
                     "fr": "Choisissez la langue de l'application"