diff --git a/mycobot_description/urdf/mybuddy/joint4_L.dae b/mycobot_description/urdf/mybuddy/joint4_L.dae
index 861b5a9..2603f48 100644
--- a/mycobot_description/urdf/mybuddy/joint4_L.dae
+++ b/mycobot_description/urdf/mybuddy/joint4_L.dae
@@ -2,11 +2,9 @@
 <COLLADA xmlns="http://www.collada.org/2005/11/COLLADASchema" version="1.4.1">
   <asset>
     <contributor>
-      <author />
+      <author>Blender User</author>
       <authoring_tool>Rhinoceros</authoring_tool>
       <comments>Output from Rhinoceros COLLADA Exporter</comments>
-      <copyright />
-      <source_data />
     </contributor>
     <created>2021-04-08T04:22:44Z</created>
     <modified>2021-04-08T04:22:44Z</modified>
diff --git a/mycobot_description/urdf/mybuddy/joint4_R.dae b/mycobot_description/urdf/mybuddy/joint4_R.dae
index 861b5a9..2603f48 100644
--- a/mycobot_description/urdf/mybuddy/joint4_R.dae
+++ b/mycobot_description/urdf/mybuddy/joint4_R.dae
@@ -2,11 +2,9 @@
 <COLLADA xmlns="http://www.collada.org/2005/11/COLLADASchema" version="1.4.1">
   <asset>
     <contributor>
-      <author />
+      <author>Blender User</author>
       <authoring_tool>Rhinoceros</authoring_tool>
       <comments>Output from Rhinoceros COLLADA Exporter</comments>
-      <copyright />
-      <source_data />
     </contributor>
     <created>2021-04-08T04:22:44Z</created>
     <modified>2021-04-08T04:22:44Z</modified>
diff --git a/mycobot_description/urdf/mybuddy/mybuddy-down.dae b/mycobot_description/urdf/mybuddy/mybuddy-down.dae
index 2ee316d..bd5eb76 100644
--- a/mycobot_description/urdf/mybuddy/mybuddy-down.dae
+++ b/mycobot_description/urdf/mybuddy/mybuddy-down.dae
@@ -2,11 +2,9 @@
 <COLLADA xmlns="http://www.collada.org/2005/11/COLLADASchema" version="1.4.1">
   <asset>
     <contributor>
-      <author />
+      <author>Blender User</author>
       <authoring_tool>Rhinoceros 7.5.21082.11001</authoring_tool>
       <comments>Output from Rhinoceros COLLADA Exporter</comments>
-      <copyright />
-      <source_data />
     </contributor>
     <created>2022-05-17T02:30:43Z</created>
     <modified>2022-05-17T02:30:43Z</modified>
diff --git a/mycobot_description/urdf/mybuddy/mybuddy-up.dae b/mycobot_description/urdf/mybuddy/mybuddy-up.dae
index 4cb47df..6560dce 100644
--- a/mycobot_description/urdf/mybuddy/mybuddy-up.dae
+++ b/mycobot_description/urdf/mybuddy/mybuddy-up.dae
@@ -2,11 +2,9 @@
 <COLLADA xmlns="http://www.collada.org/2005/11/COLLADASchema" version="1.4.1">
   <asset>
     <contributor>
-      <author />
+      <author>Blender User</author>
       <authoring_tool>Rhinoceros 7.5.21082.11001</authoring_tool>
       <comments>Output from Rhinoceros COLLADA Exporter</comments>
-      <copyright />
-      <source_data />
     </contributor>
     <created>2022-05-17T02:30:24Z</created>
     <modified>2022-05-17T02:30:24Z</modified>