diff --git a/src/mergerfs_webui.cpp b/src/mergerfs_webui.cpp
index 4aa69d71..0985a8d1 100644
--- a/src/mergerfs_webui.cpp
+++ b/src/mergerfs_webui.cpp
@@ -71,6 +71,20 @@ mergerfs::webui::main(const int   argc_,
   http_server.Get("/",::_serve_root);
   http_server.Get("/mounts",::_serve_mounts);
   http_server.Get("/kvs",::_serve_kvs);
+  http_server.Post("/update", [&](const Request& req, Response& res) {
+    try {
+      auto j = json::parse(req.body);
+      std::string key = j["key"];
+      std::string value = j["value"];
+      kv_data[key] = value;
+      std::cout << "Updated " << key << " to " << value << std::endl;
+      res.set_content("OK", "text/plain");
+    } catch (const std::exception& e) {
+      res.status = 400;
+      res.set_content("Invalid JSON", "text/plain");
+    }
+  });
+
 
   http_server.listen(host,port);