diff --git a/module3/exo1/influenza-like-illness-analysis.ipynb b/module3/exo1/influenza-like-illness-analysis.ipynb
index 091860a5ceb7945fea5d49577dd8628d55f26a3b..cc5b6b8ea553e413f2505d7ab0cfe49aa05321cb 100644
--- a/module3/exo1/influenza-like-illness-analysis.ipynb
+++ b/module3/exo1/influenza-like-illness-analysis.ipynb
@@ -198,6 +198,7 @@
    ],
    "source": [
     "import urllib.request\n",
+    "import os\n",
     "local_filename = \"local_data.csv\"\n",
     "\n",
     "if not os.path.exists(local_filename):\n",