diff --git a/MMVCTrainerFrontendDemo.ipynb b/MMVCTrainerFrontendDemo.ipynb
index 59e90ce1..002ab066 100644
--- a/MMVCTrainerFrontendDemo.ipynb
+++ b/MMVCTrainerFrontendDemo.ipynb
@@ -152,7 +152,11 @@
         "!pip install uvicorn &> /dev/null\n",
         "!pip install websockets &> /dev/null\n",
         "!pip install pyOpenSSL &> /dev/null\n",
-        "!pip install pyopenjtalk==0.2.0 &> /dev/null\n"
+        "!pip install pyopenjtalk==0.2.0 &> /dev/null\n",
+        "\n",
+        "%cd MMVC_Trainer/monotonic_align/\n",
+        "!python setup.py build_ext --inplace\n",
+        "%cd ../../"
       ],
       "metadata": {
         "id": "LwZAAuqxX7yY"
@@ -290,4 +294,4 @@
       ]
     }
   ]
-}
\ No newline at end of file
+}