diff --git a/notebooks/spark-example.ipynb b/notebooks/spark-example.ipynb
index b39dfda..267526f 100644
--- a/notebooks/spark-example.ipynb
+++ b/notebooks/spark-example.ipynb
@@ -79,7 +79,7 @@
    "outputs": [],
    "source": [
     "print('startingggg', datetime.now().strftime('%Y-%m-%d %H:%M:%S'))\n",
-    "tcp_interactions.write.format('csv').save(\"/results/spark-result\", sep='|', header=True)\n",
+    "tcp_interactions.write.format('csv').mode('overwrite').save(\"/results/spark-result\", sep='|', header=True)\n",
     "print('endingggg', datetime.now().strftime('%Y-%m-%d %H:%M:%S'))"
    ]
   },