diff --git a/src/stats-collector.hpp b/src/stats-collector.hpp
index a2be959..802769d 100644
--- a/src/stats-collector.hpp
+++ b/src/stats-collector.hpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
-/**
- * Copyright (c) 2014-2017,  The University of Memphis,
+/*
+ * Copyright (c) 2014-2023,  The University of Memphis,
  *                           Regents of the University of California
  *
  * This file is part of NLSR (Named-data Link State Routing).
@@ -28,8 +28,9 @@
 
 namespace nlsr {
 
-// brief: a class designed to handle statistical signals in nlsr
-
+/**
+ * \brief a class designed to handle statistical signals in nlsr
+ */
 class StatsCollector
 {
 public:
@@ -63,8 +64,8 @@
   HelloProtocol& m_hp;
   Statistics m_stats;
 
-  ndn::util::signal::ScopedConnection m_lsaIncrementConn;
-  ndn::util::signal::ScopedConnection m_helloIncrementConn;
+  ndn::signal::ScopedConnection m_lsaIncrementConn;
+  ndn::signal::ScopedConnection m_helloIncrementConn;
 };
 
 } // namespace nlsr