diff --git a/fsrs4anki_optimizer.ipynb b/fsrs4anki_optimizer.ipynb
index 5158abd..b624b84 100644
--- a/fsrs4anki_optimizer.ipynb
+++ b/fsrs4anki_optimizer.ipynb
@@ -106,11 +106,11 @@
         }
       ],
       "source": [
-        "# %pip install -q fsrs4anki_optimizer==4.0.2\n",
+        "%pip install -q fsrs4anki_optimizer==4.0.2\n",
         "# for local development\n",
-        "import os\n",
-        "import sys\n",
-        "sys.path.insert(0, os.path.abspath('./package/fsrs4anki_optimizer'))\n",
+        "# import os\n",
+        "# import sys\n",
+        "# sys.path.insert(0, os.path.abspath('./package/fsrs4anki_optimizer'))\n",
         "import fsrs4anki_optimizer as optimizer\n",
         "optimizer = optimizer.Optimizer()\n",
         "optimizer.anki_extract(filename)"