diff --git a/core/common.hpp b/core/common.hpp
index a5f47d9..96d34a7 100644
--- a/core/common.hpp
+++ b/core/common.hpp
@@ -54,6 +54,7 @@
 #include <set>
 #include <stdexcept>
 #include <string>
+#include <string_view>
 #include <utility>
 #include <vector>
 
@@ -93,6 +94,7 @@
 using std::const_pointer_cast;
 
 using namespace std::string_literals;
+using namespace std::string_view_literals;
 
 using ndn::span;
 using ndn::to_string;
diff --git a/core/network.cpp b/core/network.cpp
index eafc388..bfecec5 100644
--- a/core/network.cpp
+++ b/core/network.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2014-2018,  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,
@@ -59,7 +59,7 @@
 }
 
 bool
-Network::isValidCidr(const std::string& cidr)
+Network::isValidCidr(std::string_view cidr)
 {
   auto pos = cidr.find('/');
   if (pos == std::string::npos) {
diff --git a/core/network.hpp b/core/network.hpp
index 1770582..cc6c2bb 100644
--- a/core/network.hpp
+++ b/core/network.hpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
-/**
- * Copyright (c) 2014-2016,  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,
@@ -51,7 +51,7 @@
   getMaxRangeV6();
 
   static bool
-  isValidCidr(const std::string& cidr);
+  isValidCidr(std::string_view cidr);
 
   bool
   operator==(const Network& rhs) const