diff --git a/usr/shelly/shelly.c b/usr/shelly/shelly.c
index 9a8214c..78da716 100644
--- a/usr/shelly/shelly.c
+++ b/usr/shelly/shelly.c
@@ -237,10 +237,10 @@ int main(int argc, char *argv[])
 
     SHELLY_DEBUG("enabled lpuart interrupt\n");
 
-    // SHELLY_DEBUG("registering as shelly server\n");
-    // struct ump_binding_server server;
-    // err = ump_binding_register(&server, UMP_SERVER_SHELLY, connection_callback, NULL);
-    // if (err_is_fail(err)) USER_PANIC_ERR(err, "Failed to register UMP server");
+    SHELLY_DEBUG("registering as shelly server\n");
+    struct ump_binding_server server;
+    err = ump_binding_register(&server, UMP_SERVER_SHELLY, connection_callback, NULL);
+    if (err_is_fail(err)) USER_PANIC_ERR(err, "Failed to register UMP server");
 
     while (true) {
         err = event_dispatch(global_state->ws);