diff --git a/module3/exo1/analyse-syndrome-grippal.ipynb b/module3/exo1/analyse-syndrome-grippal.ipynb
index 299648e75a67f7dc6f4ccc5821d1919d5f1677fd..e1ab358dcb5747c6160799fe4ac2875f15642326 100644
--- a/module3/exo1/analyse-syndrome-grippal.ipynb
+++ b/module3/exo1/analyse-syndrome-grippal.ipynb
@@ -31,12 +31,12 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 53,
+   "execution_count": 70,
    "metadata": {},
    "outputs": [],
    "source": [
     "data_url = \"http://www.sentiweb.fr/datasets/incidence-PAY-3.csv\"\n",
-    "if not(os.path.isfile('./incidence-PAY-3.csv')):\n",
+    "if not(os.path.exists('./incidence-PAY-3.csv')):\n",
     "    raw_data_prov = pd.read_csv(data_url, encoding='ISO-8859-1')\n",
     "    raw_data_prov = raw_data_prov.dropna(axis='columns',how='all').copy()\n",
     "    raw_data_prov.to_csv('./incidence-PAY-3.csv',index=False)"