diff --git a/daemon/rib/rib-update-batch.hpp b/daemon/rib/rib-update-batch.hpp
index f3facb3..a91cad3 100644
--- a/daemon/rib/rib-update-batch.hpp
+++ b/daemon/rib/rib-update-batch.hpp
@@ -30,8 +30,7 @@
 
 #include <list>
 
-namespace nfd {
-namespace rib {
+namespace nfd::rib {
 
 using RibUpdateList = std::list<RibUpdate>;
 
@@ -69,7 +68,6 @@
   RibUpdateList m_updates;
 };
 
-} // namespace rib
-} // namespace nfd
+} // namespace nfd::rib
 
 #endif // NFD_DAEMON_RIB_RIB_UPDATE_BATCH_HPP