json/v1.0/email.json in sk_api_schema-0.3.0 vs json/v1.0/email.json in sk_api_schema-0.3.1

@@ -115,15 +115,17 @@
           "description": "Searches in all address fields: bcc, cc, to, from"
         },
         "filter[from]":{
           "title" : "From date",
           "description": "All objects updated on/after the date",
-          "type" : "date"
+          "format" : "date",
+          "type" : "string"
         },
         "filter[to]":{
           "title" : "To date",
           "description": "All objects updated on/before the date",
-          "type" : "date"
+          "format" : "date",
+          "type" : "string"
         },
         "sort_by":{
           "title" : "Sort by",
           "description": "Sort the results by the given field => number",
           "enum":["created_at", "updated_at"],
\ No newline at end of file