schema/v1.0/user.json in fidor_schema-0.3.3 vs schema/v1.0/user.json in fidor_schema-0.3.4

@@ -11,10 +11,10 @@
       "$ref"     : "./base_types/base_types.json#definitions/email",
       "required" : true,
       "readonly" : true
     },
     "last_sign_in_at" : {
-      "description" : "Last time the user accessed fidor.",
+      "description" : "Last time the user accessed fidor. ISO 8601 Date-Time",
       "format"      : "date-time",
       "readonly"    : true,
       "type"        : "string"
     },
     "created_at" : {