diff --git a/fsrs4anki_optimizer.ipynb b/fsrs4anki_optimizer.ipynb
index 803e2dc..b763f92 100644
--- a/fsrs4anki_optimizer.ipynb
+++ b/fsrs4anki_optimizer.ipynb
@@ -5,9 +5,9 @@
       "cell_type": "markdown",
       "metadata": {},
       "source": [
-        "# FSRS4Anki v4.4.6 Optimizer\n",
+        "# FSRS4Anki v4.4.7 Optimizer\n",
         "\n",
-        "[![open in colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/open-spaced-repetition/fsrs4anki/blob/v4.4.6/fsrs4anki_optimizer.ipynb)\n",
+        "[![open in colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/open-spaced-repetition/fsrs4anki/blob/v4.4.7/fsrs4anki_optimizer.ipynb)\n",
         "\n",
         "↑ Click the above button to open the optimizer on Google Colab.\n",
         "\n",
@@ -60,7 +60,7 @@
         "next_day_starts_at = 4\n",
         "\n",
         "# Replace it if you don't want the optimizer to use the review logs before a specific date.\n",
-        "revlog_start_date = \"2006-10-05\"\n",
+        "revlog_start_date = \"2006-10-05\" #YYYY-MM-DD\n",
         "\n",
         "# Set it to True if you don't want the optimizer to use the review logs from suspended cards.\n",
         "filter_out_suspended_cards = False"