diff --git a/notebooks/jupyter/package.json b/notebooks/jupyter/package.json
index 8424ae5f..63d1e554 100644
--- a/notebooks/jupyter/package.json
+++ b/notebooks/jupyter/package.json
@@ -16,7 +16,7 @@
   },
   "devDependencies": {
     "bower": "1.8.14",
-    "less": "4.1.3",
+    "less": "4.2.0",
     "onchange": "7.1.0",
     "po2json": "0.4.5",
     "requirejs": "2.3.6"