diff --git a/samples/client/petstore/javascript-promise/src/ApiClient.js b/samples/client/petstore/javascript-promise/src/ApiClient.js
index 1b186a42d79..49dd422a8f1 100644
--- a/samples/client/petstore/javascript-promise/src/ApiClient.js
+++ b/samples/client/petstore/javascript-promise/src/ApiClient.js
@@ -414,7 +414,7 @@
     if (accept) {
       request.accept(accept);
     }
-    
+
     if (returnType === 'Blob') {
       request.responseType('blob');
     }
diff --git a/samples/client/petstore/javascript-promise/src/model/FormatTest.js b/samples/client/petstore/javascript-promise/src/model/FormatTest.js
index b9fd8e93fa9..6e090034954 100644
--- a/samples/client/petstore/javascript-promise/src/model/FormatTest.js
+++ b/samples/client/petstore/javascript-promise/src/model/FormatTest.js
@@ -97,10 +97,10 @@
         obj['string'] = ApiClient.convertToType(data['string'], 'String');
       }
       if (data.hasOwnProperty('byte')) {
-        obj['byte'] = ApiClient.convertToType(data['byte'], Blob);
+        obj['byte'] = ApiClient.convertToType(data['byte'], 'Blob');
       }
       if (data.hasOwnProperty('binary')) {
-        obj['binary'] = ApiClient.convertToType(data['binary'], Blob);
+        obj['binary'] = ApiClient.convertToType(data['binary'], 'Blob');
       }
       if (data.hasOwnProperty('date')) {
         obj['date'] = ApiClient.convertToType(data['date'], 'Date');
diff --git a/samples/client/petstore/javascript/src/ApiClient.js b/samples/client/petstore/javascript/src/ApiClient.js
index 802c2e24088..5225f9611bf 100644
--- a/samples/client/petstore/javascript/src/ApiClient.js
+++ b/samples/client/petstore/javascript/src/ApiClient.js
@@ -423,7 +423,7 @@
     if (accept) {
       request.accept(accept);
     }
-    
+
     if (returnType === 'Blob') {
       request.responseType('blob');
     }
diff --git a/samples/client/petstore/javascript/src/model/FormatTest.js b/samples/client/petstore/javascript/src/model/FormatTest.js
index b9fd8e93fa9..6e090034954 100644
--- a/samples/client/petstore/javascript/src/model/FormatTest.js
+++ b/samples/client/petstore/javascript/src/model/FormatTest.js
@@ -97,10 +97,10 @@
         obj['string'] = ApiClient.convertToType(data['string'], 'String');
       }
       if (data.hasOwnProperty('byte')) {
-        obj['byte'] = ApiClient.convertToType(data['byte'], Blob);
+        obj['byte'] = ApiClient.convertToType(data['byte'], 'Blob');
       }
       if (data.hasOwnProperty('binary')) {
-        obj['binary'] = ApiClient.convertToType(data['binary'], Blob);
+        obj['binary'] = ApiClient.convertToType(data['binary'], 'Blob');
       }
       if (data.hasOwnProperty('date')) {
         obj['date'] = ApiClient.convertToType(data['date'], 'Date');