json/v1.0/estimate.json in sk_api_schema-0.0.15 vs json/v1.0/estimate.json in sk_api_schema-0.0.16

@@ -161,11 +161,11 @@
           "description": "All objects with date before the date"
         },
         "sort_by":{
           "title" : "Sort by",
           "description": "Sort the results by the given field => number",
-          "enum":['title', 'number', 'created_at', 'updated_at', 'client_id', 'price_total', 'price_tax', 'date', 'due_date'],
-          "type": 'string'
+          "enum":["title", "number", "created_at", "updated_at", "client_id", "price_total", "price_tax", "date", "due_date"],
+          "type": "string"
         },
         "sort":{
           "title" : "Sort",
           "enum":["ASC","DESC"],
           "description": "Sort the results in ASC or DESC"