diff --git a/manifest.toml b/manifest.toml
index df3ca6c..b582b0a 100644
--- a/manifest.toml
+++ b/manifest.toml
@@ -46,14 +46,14 @@ ram.runtime = "50M"
     help.en = "As Darksky is deprecating his api, it is suggested to opt for Visual Crossing"
     help.fr = "Comme Darksky déprécie son API, il est suggéré d'opter pour Visual Crossing"
     type = "select"
-    choices = [" ","darksky", "visualcrossing"]
-    default = " "
+    choices = ["darksky", "visualcrossing"]
+    optional = true
 
     [install.weather_key]
     ask.en = "Insert here the api key from the chosen weather provider"
     ask.fr = "Insérez ici la clé API du fournisseur de météo choisi"
     type = "string"
-    default = ""
+    optional = true
 
   [resources]
     [resources.system_user]