diff --git a/io_scene_gltf2/__init__.py b/io_scene_gltf2/__init__.py
index 1cd299a3e9520bf5af53082854810701e0047453..8bea4aae8b86ee5353479e797aea48a953e7b05a 100755
--- a/io_scene_gltf2/__init__.py
+++ b/io_scene_gltf2/__init__.py
@@ -4,7 +4,7 @@
 bl_info = {
     'name': 'glTF 2.0 format',
     'author': 'Julien Duroure, Scurest, Norbert Nopper, Urs Hanselmann, Moritz Becher, Benjamin Schmithüsen, Jim Eckerlein, and many external contributors',
-    "version": (3, 3, 8),
+    "version": (3, 3, 9),
     'blender': (3, 3, 0),
     'location': 'File > Import-Export',
     'description': 'Import-Export as glTF 2.0',
diff --git a/io_scene_gltf2/blender/exp/gltf2_blender_gather_drivers.py b/io_scene_gltf2/blender/exp/gltf2_blender_gather_drivers.py
index b0e538c87dc0f9bcdd155b3f22be2182241120dc..4b24599aa3d59104127af67e479f80422917c16a 100644
--- a/io_scene_gltf2/blender/exp/gltf2_blender_gather_drivers.py
+++ b/io_scene_gltf2/blender/exp/gltf2_blender_gather_drivers.py
@@ -13,7 +13,7 @@ def get_sk_drivers(blender_armature_uuid, export_settings):
     drivers = []
 
     # Take into account skinned mesh, and mesh parented to a bone of the armature
-    children_list = export_settings['vtree'].nodes[blender_armature_uuid].children
+    children_list = export_settings['vtree'].nodes[blender_armature_uuid].children.copy()
     for bone in export_settings['vtree'].get_all_bones(blender_armature_uuid):
         children_list.extend(export_settings['vtree'].nodes[bone].children)