diff --git a/templates/404.html b/templates/404.html
new file mode 100644
index 00000000..ae7ae0f4
--- /dev/null
+++ b/templates/404.html
@@ -0,0 +1,13 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"
+    "http://www.w3.org/TR/html4/strict.dtd">
+<html lang="en">
+<head>
+    <title>Page not found</title>
+</head>
+<body>
+    <h1>Page not found</h1>
+
+    <p>Sorry, but the requested page could not be found.</p>
+
+</body>
+</html>
diff --git a/templates/505.html b/templates/505.html
new file mode 100644
index 00000000..a7beaded
--- /dev/null
+++ b/templates/505.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"
+    "http://www.w3.org/TR/html4/strict.dtd">
+<html lang="en">
+<head>
+    <title>Page unavailable</title>
+</head>
+<body>
+    <h1>Page unavailable</h1>
+
+    <p>Sorry, but the requested page is unavailable due to a
+    server hiccup.</p>
+
+    <p>Our engineers have been notified, so check back later.</p>
+</body>
+</html>
