diff --git a/langchain/sales_chatbot/sales.ipynb b/langchain/sales_chatbot/sales.ipynb
index 0b76ac03..e2b0d273 100644
--- a/langchain/sales_chatbot/sales.ipynb
+++ b/langchain/sales_chatbot/sales.ipynb
@@ -89,7 +89,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "with open(\"real_estate_sales_data.txt\") as f:\n",
+    "with open(\"real_estate_sales_data.txt\", encoding='utf-8') as f:\n",
     "    real_estate_sales = f.read()"
    ]
   },