diff --git a/package.xml b/package.xml
index 07007a0f..f235a1af 100644
--- a/package.xml
+++ b/package.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0"?>
-<?xml-model href="http://download.ros.org/schema/package_format2.xsd" schematypens="http://www.w3.org/2001/XMLSchema"?>
+<?xml-model href="http://download.ros.org/schema/package_format3.xsd" schematypens="http://www.w3.org/2001/XMLSchema"?>
 <package format="3">
   <name>apriltag</name>
   <version>3.3.0</version>
@@ -7,13 +7,14 @@
 
   <maintainer email="mkrogius@umich.edu">Max Krogius</maintainer>
   <maintainer email="opensource@wolfgangmerkt.com">Wolfgang Merkt</maintainer>
-
-  <author email="ebolson@umich.edu">Edwin Olson</author>
-  <author email="mkrogius@umich.edu">Max Krogius</author>
+  <maintainer email="Rauch.Christian@gmx.de">Christian Rauch</maintainer>
 
   <license>BSD</license>
   <url>https://april.eecs.umich.edu/software/apriltag.html</url>
 
+  <author email="ebolson@umich.edu">Edwin Olson</author>
+  <author email="mkrogius@umich.edu">Max Krogius</author>
+
   <buildtool_depend>cmake</buildtool_depend>
   <build_depend condition="$ROS_PYTHON_VERSION == 3">python3-numpy</build_depend>