diff --git a/_404.html b/_404.html
new file mode 100644
index 0000000..84974ea
--- /dev/null
+++ b/_404.html
@@ -0,0 +1,36 @@
+<!doctype html>
+<html lang="en-US">
+  <head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width" />
+    <title>404</title>
+    <style>
+        body, html, div {
+            width: 100%;
+            height: 100%;
+            margin: 0;
+        }
+        div {
+            font-family: sans-serif;
+            display: flex;
+            justify-content: center;
+            align-items: center;
+            flex-direction: column;
+        }
+        p {
+            padding: 0px 10px;
+            max-width: 30em;
+        }
+    </style>
+  </head>
+  <body>
+    <div>
+    <h1>Not found...</h1>
+    <p>
+        I recently moved to a new web host.
+        If you think something should be at this address,
+        please <a href="https://github.com/mon">get in touch</a>.
+    </p>
+    </div>
+  </body>
+</html>
