diff --git a/ipynb/Cheryl.ipynb b/ipynb/Cheryl.ipynb
index 452b977..dfd77d1 100644
--- a/ipynb/Cheryl.ipynb
+++ b/ipynb/Cheryl.ipynb
@@ -4,7 +4,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<div align=right><i>Peter Norvig<br>April 2015<br>Python 3: Feb 2019</i></div>\n",
+    "<div align=\"right\"><i>Peter Norvig<br>April 2015<br>Python 3: Feb 2019</i></div>\n",
     "\n",
     "# When is Cheryl's Birthday?\n",
     "\n",