diff --git a/src/ApiClient.js b/src/ApiClient.js
index f338cb30..56276e9b 100644
--- a/src/ApiClient.js
+++ b/src/ApiClient.js
@@ -688,6 +688,11 @@
         } else if (Array.isArray(type)) {
           // for array type like: ['String']
           var itemType = type[0];
+          if (typeof(data) === 'string') {
+            return [data].map(function(item) {
+              return exports.convertToType(item, itemType);
+            });
+          }
           return data.map(function(item) {
             return exports.convertToType(item, itemType);
           });