diff --git a/module3/exo1/analyse-syndrome-grippal.ipynb b/module3/exo1/analyse-syndrome-grippal.ipynb
index 8e17e1b2c3c35375cd11c7d3f8f1c1910cc3f0f7..f35c437a717c5d2943428db843a3456de7e715ba 100644
--- a/module3/exo1/analyse-syndrome-grippal.ipynb
+++ b/module3/exo1/analyse-syndrome-grippal.ipynb
@@ -32,6 +32,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
+    "data_url = \"http://www.sentiweb.fr/datasets/incidence-PAY-3.csv\"\n",
     "data_file = \"syndrome-grippal.csv\"\n",
     "\n",
     "import os\n",