diff --git a/docs.py b/docs.py
index 88be5df..de55efd 100644
--- a/docs.py
+++ b/docs.py
@@ -1,10 +1,14 @@
-from flask import Flask, send_from_directory, render_template
-from livereload import Server
-import xml_lexer
-
+import datetime
 import re
 import os
 
+from urllib.parse import urlparse
+
+from flask import Flask, send_from_directory, render_template, make_response, request
+from livereload import Server
+
+import xml_lexer
+
 
 app = Flask(__name__)
 app.jinja_options.setdefault('extensions', []).append('jinja2_highlight.HighlightExtension')
@@ -99,20 +103,32 @@ for base, _, files in os.walk(TEMPLATES + "/" + PAGES_BASE):
             app.add_url_rule(route, route, handler)
 
 
-# from flask import url_for
-# def has_no_empty_params(rule):
-#     defaults = rule.defaults if rule.defaults is not None else ()
-#     arguments = rule.arguments if rule.arguments is not None else ()
-#     return len(defaults) >= len(arguments)
-# @app.route("/site-map")
-# def site_map():
-#     links = []
-#     for rule in app.url_map.iter_rules():
-#         if "GET" in rule.methods and has_no_empty_params(rule):
-#             url = url_for(rule.endpoint, **(rule.defaults or {}))
-#             links.append((url, rule.endpoint))
-#     return str(links)
+from flask import url_for
 
+@app.route("/sitemap.xml")
+def sitemap():
+    host_components = urlparse(request.host_url)
+    host_base = host_components.scheme + "://" + host_components.netloc + ROOT
+
+    links = []
+    for rule in app.url_map.iter_rules():
+        if "GET" in rule.methods and len(rule.arguments) == 0:
+            url = url_for(rule.endpoint, **(rule.defaults or {}))
+            if not url.endswith(("/", ".html", ".png")):
+                continue
+            path = rule.endpoint
+            if path.endswith("/"):
+                path += "index.html"
+            path = os.path.join(TEMPLATES, PAGES_BASE, path.lstrip("/"))
+            if os.path.exists(path):
+                mod_time = os.path.getmtime(path)
+                mod_time = datetime.datetime.fromtimestamp(mod_time).strftime("%Y-%m-%dT%H:%M:%SZ")
+            else:
+                mod_time = None
+            links.append((host_base + url, mod_time))
+    response = make_response(render_template("sitemap.xml", urls=links))
+    response.headers["Content-Type"] = "application/xml"
+    return response
 
 if __name__ == '__main__':
     app.config['TEMPLATES_AUTO_RELOAD'] = True
diff --git a/templates/sitemap.xml b/templates/sitemap.xml
new file mode 100644
index 0000000..24440ac
--- /dev/null
+++ b/templates/sitemap.xml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
+{% for url in urls %}
+  <url>
+    <loc>{{ url[0] }}</loc>{% if url[1] %}
+    <lastmod>{{ url[1] }}</lastmod>{% endif %}
+  </url>
+{% endfor %}
+</urlset>
\ No newline at end of file