diff --git a/module2/exo1/toy_notebook_en.ipynb b/module2/exo1/toy_notebook_en.ipynb
index 2a1dc06a35f6dd493238c19723d3bfd5d03649b7..e140bc08069b5873f79b15493e3ced7a3e2b0747 100644
--- a/module2/exo1/toy_notebook_en.ipynb
+++ b/module2/exo1/toy_notebook_en.ipynb
@@ -18,7 +18,11 @@
   {
    "cell_type": "code",
    "execution_count": 1,
-   "metadata": {},
+   "metadata": {
+   "hideCode": false,
+   "hidePrompt": false,
+   "scrolled": true
+   },
    "outputs": [
     {
      "name": "stdout",
@@ -44,7 +48,11 @@
   {
    "cell_type": "code",
    "execution_count": 2,
-   "metadata": {},
+   "metadata": {
+   "hideCode": false,
+   "hidePrompt": false,
+   "scrolled": true
+   },
    "outputs": [
     {
      "data": {
@@ -53,7 +61,10 @@
       ]
      },
      "execution_count": 2,
-     "metadata": {},
+     "metadata": {
+     "hideCode": false,
+     "hidePrompt": false,
+     "scrolled": true},
      "output_type": "execute_result"
     }
    ],
@@ -78,6 +89,8 @@
    "cell_type": "code",
    "execution_count": 3,
    "metadata": {
+    "hideCode": false,
+    "hidePrompt": false,
     "scrolled": true
    },
    "outputs": [
@@ -122,7 +135,10 @@
   {
    "cell_type": "code",
    "execution_count": 4,
-   "metadata": {},
+   "metadata": {
+   "hideCode": false,
+   "hidePrompt": false,
+   "scrolled": true},
    "outputs": [
     {
      "data": {
@@ -141,6 +157,7 @@
   }
  ],
  "metadata": {
+  "celltoolbar": "Hide code",
   "kernelspec": {
    "display_name": "Python 3",
    "language": "python",
@@ -156,7 +173,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.7.7"
+   "version": "3.6.2"
   }
  },
  "nbformat": 4,