diff --git a/doc_generator/lib_docgenerator.js b/doc_generator/lib_docgenerator.js
index a048b4513e..85a3b35ab2 100644
--- a/doc_generator/lib_docgenerator.js
+++ b/doc_generator/lib_docgenerator.js
@@ -1,6 +1,6 @@
 var doc = require("surveyjs-doc-generator");
 var ts = require("typescript");
-var Survey = require("../build/survey-knockout/survey.ko");
+var Survey = require("../build/survey-core/survey.core");
 
 doc.setJsonObj(Survey.Serializer);