diff --git a/site/en/guide/basics.ipynb b/site/en/guide/basics.ipynb
index e7082ba4e1..5457f162a0 100644
--- a/site/en/guide/basics.ipynb
+++ b/site/en/guide/basics.ipynb
@@ -904,7 +904,7 @@
         "                        batch_size=32,\n",
         "                        verbose=0)\n",
         "\n",
-        "new_model.save('./my_new_model')"
+        "new_model.save('./my_new_model.keras')"
       ]
     },
     {