diff --git a/daemon/face/websocket-transport.cpp b/daemon/face/websocket-transport.cpp
index 33ae643..2d118ec 100644
--- a/daemon/face/websocket-transport.cpp
+++ b/daemon/face/websocket-transport.cpp
@@ -83,7 +83,7 @@
   NFD_LOG_FACE_TRACE(__func__);
 
   websocketpp::lib::error_code error;
-  m_server.send(m_handle, packet.wire(), packet.size(),
+  m_server.send(m_handle, packet.data(), packet.size(),
                 websocketpp::frame::opcode::binary, error);
   if (error)
     return processErrorCode(error);
diff --git a/daemon/table/dead-nonce-list.cpp b/daemon/table/dead-nonce-list.cpp
index 5805842..55bf346 100644
--- a/daemon/table/dead-nonce-list.cpp
+++ b/daemon/table/dead-nonce-list.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2014-2021,  Regents of the University of California,
+ * Copyright (c) 2014-2022,  Regents of the University of California,
  *                           Arizona Board of Regents,
  *                           Colorado State University,
  *                           University Pierre & Marie Curie, Sorbonne University,
@@ -109,7 +109,7 @@
   const auto& nameWire = name.wireEncode();
   uint32_t n;
   std::memcpy(&n, nonce.data(), sizeof(n));
-  return CityHash64WithSeed(reinterpret_cast<const char*>(nameWire.wire()), nameWire.size(), n);
+  return CityHash64WithSeed(reinterpret_cast<const char*>(nameWire.data()), nameWire.size(), n);
 }
 
 size_t
diff --git a/daemon/table/name-tree-hashtable.cpp b/daemon/table/name-tree-hashtable.cpp
index 7d20a34..30e4ca3 100644
--- a/daemon/table/name-tree-hashtable.cpp
+++ b/daemon/table/name-tree-hashtable.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2014-2019,  Regents of the University of California,
+ * Copyright (c) 2014-2022,  Regents of the University of California,
  *                           Arizona Board of Regents,
  *                           Colorado State University,
  *                           University Pierre & Marie Curie, Sorbonne University,
@@ -64,7 +64,7 @@
   HashValue h = 0;
   for (size_t i = 0, last = std::min(prefixLen, name.size()); i < last; ++i) {
     const name::Component& comp = name[i];
-    h ^= HashFunc::compute(comp.wire(), comp.size());
+    h ^= HashFunc::compute(comp.data(), comp.size());
   }
   return h;
 }
@@ -83,7 +83,7 @@
 
   for (size_t i = 0; i < last; ++i) {
     const name::Component& comp = name[i];
-    h ^= HashFunc::compute(comp.wire(), comp.size());
+    h ^= HashFunc::compute(comp.data(), comp.size());
     seq.push_back(h);
   }
   return seq;
diff --git a/tests/daemon/face/websocket-channel-fixture.hpp b/tests/daemon/face/websocket-channel-fixture.hpp
index e6e1e9f..3072992 100644
--- a/tests/daemon/face/websocket-channel-fixture.hpp
+++ b/tests/daemon/face/websocket-channel-fixture.hpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2014-2021,  Regents of the University of California,
+ * Copyright (c) 2014-2022,  Regents of the University of California,
  *                           Arizona Board of Regents,
  *                           Colorado State University,
  *                           University Pierre & Marie Curie, Sorbonne University,
@@ -93,7 +93,7 @@
   clientSendInterest(const Interest& interest)
   {
     const Block& payload = interest.wireEncode();
-    client.send(clientHandle, payload.wire(), payload.size(), websocketpp::frame::opcode::binary);
+    client.send(clientHandle, payload.data(), payload.size(), websocketpp::frame::opcode::binary);
   }
 
 private:
diff --git a/tests/daemon/face/websocket-transport.t.cpp b/tests/daemon/face/websocket-transport.t.cpp
index c0b8367..008a41f 100644
--- a/tests/daemon/face/websocket-transport.t.cpp
+++ b/tests/daemon/face/websocket-transport.t.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2014-2019,  Regents of the University of California,
+ * Copyright (c) 2014-2022,  Regents of the University of California,
  *                           Arizona Board of Regents,
  *                           Colorado State University,
  *                           University Pierre & Marie Curie, Sorbonne University,
@@ -147,7 +147,7 @@
   TRANSPORT_TEST_INIT();
 
   auto pkt1 = ndn::encoding::makeStringBlock(300, "hello");
-  this->client.send(this->clientHdl, pkt1.wire(), pkt1.size(), websocketpp::frame::opcode::binary);
+  this->client.send(this->clientHdl, pkt1.data(), pkt1.size(), websocketpp::frame::opcode::binary);
   BOOST_CHECK_EQUAL(this->limitedIo.run(1, // serverHandleMessage
                                         1_s), LimitedIo::EXCEED_OPS);
 
@@ -155,7 +155,7 @@
   BOOST_CHECK_EQUAL(this->transport->getCounters().nInBytes, pkt1.size());
 
   auto pkt2 = ndn::encoding::makeStringBlock(301, "world!");
-  this->client.send(this->clientHdl, pkt2.wire(), pkt2.size(), websocketpp::frame::opcode::binary);
+  this->client.send(this->clientHdl, pkt2.data(), pkt2.size(), websocketpp::frame::opcode::binary);
   BOOST_CHECK_EQUAL(this->limitedIo.run(1, // serverHandleMessage
                                         1_s), LimitedIo::EXCEED_OPS);
 
@@ -175,7 +175,7 @@
   TRANSPORT_TEST_INIT();
 
   auto pkt1 = ndn::encoding::makeStringBlock(300, "hello");
-  this->client.send(this->clientHdl, pkt1.wire(), pkt1.size() - 1, // truncated
+  this->client.send(this->clientHdl, pkt1.data(), pkt1.size() - 1, // truncated
                     websocketpp::frame::opcode::binary);
   BOOST_CHECK_EQUAL(this->limitedIo.run(1, // serverHandleMessage
                                         1_s), LimitedIo::EXCEED_OPS);
@@ -185,7 +185,7 @@
   BOOST_CHECK_EQUAL(this->serverReceivedPackets->size(), 0);
 
   auto pkt2 = ndn::encoding::makeStringBlock(301, "world!");
-  this->client.send(this->clientHdl, pkt2.wire(), pkt2.size(), websocketpp::frame::opcode::binary);
+  this->client.send(this->clientHdl, pkt2.data(), pkt2.size(), websocketpp::frame::opcode::binary);
   BOOST_CHECK_EQUAL(this->limitedIo.run(1, // serverHandleMessage
                                         1_s), LimitedIo::EXCEED_OPS);
 
diff --git a/tests/daemon/mgmt/command-authenticator.t.cpp b/tests/daemon/mgmt/command-authenticator.t.cpp
index c52c81b..7db02ca 100644
--- a/tests/daemon/mgmt/command-authenticator.t.cpp
+++ b/tests/daemon/mgmt/command-authenticator.t.cpp
@@ -297,8 +297,7 @@
   BOOST_CHECK_EQUAL(authorize1(
     [] (Interest& interest) {
       ndn::SignatureInfo sigInfo(tlv::SignatureSha256WithRsa);
-      setNameComponent(interest, ndn::signed_interest::POS_SIG_INFO,
-                       sigInfo.wireEncode().begin(), sigInfo.wireEncode().end());
+      setNameComponent(interest, ndn::signed_interest::POS_SIG_INFO, ndn::make_span(sigInfo.wireEncode()));
     }
   ), false);
   BOOST_CHECK(lastRejectReply == ndn::mgmt::RejectReply::SILENT);
@@ -313,8 +312,7 @@
                                            {0xDD, 0xDD, 0xDD, 0xDD, 0xDD, 0xDD, 0xDD, 0xDD}));
       ndn::SignatureInfo sigInfo(tlv::SignatureSha256WithRsa);
       sigInfo.setKeyLocator(kl);
-      setNameComponent(interest, ndn::signed_interest::POS_SIG_INFO,
-                       sigInfo.wireEncode().begin(), sigInfo.wireEncode().end());
+      setNameComponent(interest, ndn::signed_interest::POS_SIG_INFO, ndn::make_span(sigInfo.wireEncode()));
     }
   ), false);
   BOOST_CHECK(lastRejectReply == ndn::mgmt::RejectReply::SILENT);
diff --git a/tests/daemon/mgmt/face-manager.t.cpp b/tests/daemon/mgmt/face-manager.t.cpp
index 0e43944..828325f 100644
--- a/tests/daemon/mgmt/face-manager.t.cpp
+++ b/tests/daemon/mgmt/face-manager.t.cpp
@@ -216,18 +216,16 @@
   auto face2 = addFace(REMOVE_LAST_NOTIFICATION | SET_SCOPE_LOCAL); // dummy://, local
   auto face3 = addFace(REMOVE_LAST_NOTIFICATION | SET_URI_TEST); // test://
 
-  auto generateQuery = [] (const FaceQueryFilter& filter) {
-    return Interest(Name("/localhost/nfd/faces/query")
-                    .append(filter.wireEncode().begin(), filter.wireEncode().end()))
+  auto generateQuery = [] (const auto& filter) {
+    return Interest(Name("/localhost/nfd/faces/query").append(tlv::GenericNameComponent, filter.wireEncode()))
            .setCanBePrefix(true);
   };
 
   auto schemeQuery = generateQuery(FaceQueryFilter().setUriScheme("dummy"));
   auto idQuery = generateQuery(FaceQueryFilter().setFaceId(face1->getId()));
   auto scopeQuery = generateQuery(FaceQueryFilter().setFaceScope(ndn::nfd::FACE_SCOPE_NON_LOCAL));
-  auto invalidContent = ndn::makeStringBlock(tlv::Content, "invalid");
   auto invalidQueryName = Name("/localhost/nfd/faces/query")
-                          .append(invalidContent.begin(), invalidContent.end());
+                          .append(tlv::GenericNameComponent, ndn::makeStringBlock(tlv::Content, "invalid"));
   auto invalidQuery = Interest(invalidQueryName).setCanBePrefix(true);
 
   receiveInterest(schemeQuery); // face1 and face2 expected
diff --git a/tests/daemon/mgmt/manager-common-fixture.cpp b/tests/daemon/mgmt/manager-common-fixture.cpp
index db207e9..83136be 100644
--- a/tests/daemon/mgmt/manager-common-fixture.cpp
+++ b/tests/daemon/mgmt/manager-common-fixture.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2014-2021,  Regents of the University of California,
+ * Copyright (c) 2014-2022,  Regents of the University of California,
  *                           Arizona Board of Regents,
  *                           Colorado State University,
  *                           University Pierre & Marie Curie, Sorbonne University,
@@ -47,7 +47,7 @@
                                                         const ControlParameters& params,
                                                         const Name& identity)
 {
-  commandName.append(params.wireEncode());
+  commandName.append(tlv::GenericNameComponent, params.wireEncode());
   return this->makeCommandInterest(commandName, identity);
 }
 
@@ -155,12 +155,11 @@
   }
 
   ndn::EncodingBuffer encoder;
-  size_t valueLength = 0;
+  size_t length = 0;
   for (size_t i = startIndex; i < endIndex ; i ++) {
-    valueLength += encoder.appendByteArray(m_responses[i].getContent().value(),
-                                           m_responses[i].getContent().value_size());
+    length += encoder.appendBytes(m_responses[i].getContent().value_bytes());
   }
-  encoder.prependVarNumber(valueLength);
+  encoder.prependVarNumber(length);
   encoder.prependVarNumber(tlv::Content);
   return encoder.block();
 }
diff --git a/tests/daemon/mgmt/rib-manager-sl-announce.t.cpp b/tests/daemon/mgmt/rib-manager-sl-announce.t.cpp
index 616b6e8..597bad4 100644
--- a/tests/daemon/mgmt/rib-manager-sl-announce.t.cpp
+++ b/tests/daemon/mgmt/rib-manager-sl-announce.t.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2014-2020,  Regents of the University of California,
+ * Copyright (c) 2014-2022,  Regents of the University of California,
  *                           Arizona Board of Regents,
  *                           Colorado State University,
  *                           University Pierre & Marie Curie, Sorbonne University,
@@ -153,13 +153,11 @@
   std::string
   getIdentityCertificateBase64(const Name& identity) const
   {
-    auto cert = m_keyChain.getPib().getIdentity(identity).getDefaultKey().getDefaultCertificate();
-    const auto& block = cert.wireEncode();
-
     namespace tr = ndn::security::transform;
-    std::ostringstream oss;
-    tr::bufferSource(block.wire(), block.size()) >> tr::base64Encode(false) >> tr::streamSink(oss);
 
+    auto cert = m_keyChain.getPib().getIdentity(identity).getDefaultKey().getDefaultCertificate();
+    std::ostringstream oss;
+    tr::bufferSource(cert.wireEncode()) >> tr::base64Encode(false) >> tr::streamSink(oss);
     return oss.str();
   }
 
diff --git a/wscript b/wscript
index afec2fc..b08fbf6 100644
--- a/wscript
+++ b/wscript
@@ -94,8 +94,9 @@
     conf.find_program('bash', var='BASH')
     conf.find_program('dot', var='DOT', mandatory=False)
 
-    conf.check_cfg(package='libndn-cxx', args=['--cflags', '--libs'], uselib_store='NDN_CXX',
-                   pkg_config_path=os.environ.get('PKG_CONFIG_PATH', '%s/pkgconfig' % conf.env.LIBDIR))
+    pkg_config_path = os.environ.get('PKG_CONFIG_PATH', f'{conf.env.LIBDIR}/pkgconfig')
+    conf.check_cfg(package='libndn-cxx', args=['libndn-cxx >= 0.8.0', '--cflags', '--libs'],
+                   uselib_store='NDN_CXX', pkg_config_path=pkg_config_path)
 
     if not conf.options.without_systemd:
         conf.check_cfg(package='libsystemd', args=['--cflags', '--libs'],