diff --git a/tools/chunks/catchunks/pipeline-interests-cubic.cpp b/tools/chunks/catchunks/pipeline-interests-cubic.cpp
index 74aab0c..5eaf411 100644
--- a/tools/chunks/catchunks/pipeline-interests-cubic.cpp
+++ b/tools/chunks/catchunks/pipeline-interests-cubic.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2016-2019, Regents of the University of California,
+ * Copyright (c) 2016-2022, Regents of the University of California,
  *                          Colorado State University,
  *                          University Pierre & Marie Curie, Sorbonne University.
  *
@@ -27,8 +27,7 @@
 
 #include <cmath>
 
-namespace ndn {
-namespace chunks {
+namespace ndn::chunks {
 
 constexpr double CUBIC_C = 0.4;
 
@@ -111,5 +110,4 @@
   emitSignal(afterCwndChange, time::steady_clock::now() - getStartTime(), m_cwnd);
 }
 
-} // namespace chunks
-} // namespace ndn
+} // namespace ndn::chunks