diff --git a/1-Introduction/01-defining-data-science/notebook.ipynb b/1-Introduction/01-defining-data-science/notebook.ipynb
index 0e9199fc..fb503a19 100644
--- a/1-Introduction/01-defining-data-science/notebook.ipynb
+++ b/1-Introduction/01-defining-data-science/notebook.ipynb
@@ -44,7 +44,12 @@
    "source": [
     "import requests\r\n",
     "\r\n",
-    "text = requests.get(url).content.decode('utf-8')\r\n",
+    "headers = {\r\n",
+    "    'User-Agent': 'DataScienceForBeginners/1.0 (https://github.com/microsoft/Data-Science-For-Beginners)'\r\n",
+    "}\r\n",
+    "response = requests.get(url, headers=headers)\r\n",
+    "response.raise_for_status()\r\n",
+    "text = response.content.decode('utf-8')\r\n",
     "print(text[:1000])"
    ],
    "outputs": [