diff --git a/tools/ndnsec/cert-gen.cpp b/tools/ndnsec/cert-gen.cpp
index f63a2ea..dbab9cb 100644
--- a/tools/ndnsec/cert-gen.cpp
+++ b/tools/ndnsec/cert-gen.cpp
@@ -136,7 +136,7 @@
   try {
     Buffer keyContent = certRequest.getPublicKey();
     t::PublicKey pubKey;
-    pubKey.loadPkcs8(keyContent.buf(), keyContent.size());
+    pubKey.loadPkcs8(keyContent.data(), keyContent.size());
   }
   catch (const std::exception& e) {
     std::cerr << "ERROR: " << e.what() << std::endl;
diff --git a/tools/ndnsec/sign-req.cpp b/tools/ndnsec/sign-req.cpp
index da330cf..a03a595 100644
--- a/tools/ndnsec/sign-req.cpp
+++ b/tools/ndnsec/sign-req.cpp
@@ -1,5 +1,5 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
-/**
+/*
  * Copyright (c) 2013-2017 Regents of the University of California.
  *
  * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
@@ -99,7 +99,7 @@
   certificate.setFreshnessPeriod(time::hours(1));
 
   // set content
-  certificate.setContent(key.getPublicKey().buf(), key.getPublicKey().size());
+  certificate.setContent(key.getPublicKey().data(), key.getPublicKey().size());
 
   // set signature-info
   SignatureInfo signatureInfo;