diff --git a/vertx/public/dataviewer/package.json b/vertx/public/dataviewer/package.json
index 3c05d6f..fc6b1b1 100644
--- a/vertx/public/dataviewer/package.json
+++ b/vertx/public/dataviewer/package.json
@@ -11,7 +11,7 @@
     "gulp-minify-css": "~1.2.4",
     "jquery": "~3.1.1",
     "jstree": "~3.3.2",
-    "knockout": "~3.4.0",
+    "knockout": "~3.5.0",
     "mustache": "^2.2.1",
     "split.js": "~1.0.7",
     "webworkify": "~1.4.0"