diff --git a/lumi2/static/robots.txt b/lumi2/static/robots.txt
new file mode 100644
index 0000000..1f53798
--- /dev/null
+++ b/lumi2/static/robots.txt
@@ -0,0 +1,2 @@
+User-agent: *
+Disallow: /
diff --git a/lumi2/usermanager.py b/lumi2/usermanager.py
index 1d1985d..d0edc8e 100644
--- a/lumi2/usermanager.py
+++ b/lumi2/usermanager.py
@@ -92,6 +92,13 @@ def about():
     return render_template('usermanager/about.html')
 
 
+@bp.route('/robots.txt')
+def robots():
+    """Serves the 'robots.txt' file."""
+
+    return send_from_directory(current_app.static_folder, "robots.txt")
+
+
 @bp.route("/users/view/<string:username>")
 @login_required
 def user_view(username: str):