diff --git a/eth/demo.ipynb b/eth/demo.ipynb
index c6d2463..c3ce603 100644
--- a/eth/demo.ipynb
+++ b/eth/demo.ipynb
@@ -1,5 +1,13 @@
 {
  "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "5d767370",
+   "metadata": {},
+   "source": [
+    "![fig](https://raw.githubusercontent.com/zk-ml/demo/main/protocol_overview.jpg)"
+   ]
+  },
   {
    "cell_type": "markdown",
    "id": "de3ba1fc",
@@ -516,7 +524,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "a0ad997d",
+   "id": "ca7e00c8",
    "metadata": {},
    "outputs": [],
    "source": []