diff --git a/src/404.md b/src/404.md
new file mode 100644
index 0000000..063321d
--- /dev/null
+++ b/src/404.md
@@ -0,0 +1,7 @@
+---
+title: Sorry, can't find that
+permalink: "404.html"
+eleventyExcludeFromCollections: true
+---
+
+<p>Go <a href="/">home</a>.</p>