diff --git a/python/examples/jupyter-notebook-demo.ipynb b/python/examples/jupyter-notebook-demo.ipynb
index 9101a99b23..7264fe076c 100644
--- a/python/examples/jupyter-notebook-demo.ipynb
+++ b/python/examples/jupyter-notebook-demo.ipynb
@@ -167,7 +167,7 @@
    "outputs": [],
    "source": [
     "with viewer.txn() as s:\n",
-    "    s.layers['segmentation'].segments.update([1752, 88847])\n",
+    "    s.layers['segmentation'].segments |= [1752, 88847]\n",
     "    s.layers['segmentation'].visible = True"
    ]
   },