diff --git a/launch/tier4_map_launch/package.xml b/launch/tier4_map_launch/package.xml
index 683d7b7ed533f..b4e3303e23c58 100644
--- a/launch/tier4_map_launch/package.xml
+++ b/launch/tier4_map_launch/package.xml
@@ -5,6 +5,8 @@
   <version>0.1.0</version>
   <description>The tier4_map_launch package</description>
   <maintainer email="ryohsuke.mitsudome@tier4.jp">Ryohsuke Mitsudome</maintainer>
+  <maintainer email="ryu.yamamoto@tier4.jp">Ryu Yamamoto</maintainer>
+  <maintainer email="koji.minoda@tier4.jp">Koji Minoda</maintainer>
   <license>Apache License 2.0</license>
 
   <buildtool_depend>ament_cmake_auto</buildtool_depend>