diff --git a/tools/ndnsec/cert-dump.cpp b/tools/ndnsec/cert-dump.cpp
index 0baf8df..3b4f9cf 100644
--- a/tools/ndnsec/cert-dump.cpp
+++ b/tools/ndnsec/cert-dump.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2013-2023 Regents of the University of California.
+ * Copyright (c) 2013-2024 Regents of the University of California.
  *
  * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
  *
@@ -43,6 +43,8 @@
   po::options_description description(
     "Usage: ndnsec cert-dump [-h] [-p] [-r [-H HOST] [-P PORT]] [-i|-k|-f] [-n] NAME\n"
     "\n"
+    "Display a certificate from a file or the local PIB.\n"
+    "\n"
     "Options");
   description.add_options()
     ("help,h", "produce help message")