diff --git a/book/features/interactive_element.ipynb b/book/features/interactive_element.ipynb
index e809afa..ed7d322 100644
--- a/book/features/interactive_element.ipynb
+++ b/book/features/interactive_element.ipynb
@@ -324,7 +324,7 @@
     "The example below shows a custom HTML/Javascript element\n",
     "\n",
     "```{iframe} ../_static/element_pdf_and_cdf.html\n",
-    ":width: 100%\n",
+    ":width: 600px\n",
     ":height: 300px\n",
     "```"
    ]