diff --git a/tribe_demo.ipynb b/tribe_demo.ipynb
index 232905b6..906b1ae1 100644
--- a/tribe_demo.ipynb
+++ b/tribe_demo.ipynb
@@ -40,6 +40,20 @@
         "!uv pip install \"tribev2[plotting] @ git+https://github.com/facebookresearch/tribev2.git\""
       ]
     },
+    {
+      "cell_type": "markdown",
+      "id": "e27cab4b",
+      "metadata": {},
+      "source": [
+        "> **⚠️ Important: Restart Runtime Required**\n",
+        ">\n",
+        "> After running the installation cell above, you must **restart the Colab runtime** before continuing:\n",
+        ">\n",
+        "> `Menu > Runtime > Restart runtime`\n",
+        ">\n",
+        "> This ensures the updated NumPy version loads correctly. Skipping this step causes `ImportError: cannot import name '_center' from 'numpy._core.umath'`."
+      ]
+    },
     {
       "cell_type": "markdown",
       "id": "45e1d595",