diff --git a/Blender/coa_tools/operators/version_converter.py b/Blender/coa_tools/operators/version_converter.py
index 85fa7bb..a64454a 100644
--- a/Blender/coa_tools/operators/version_converter.py
+++ b/Blender/coa_tools/operators/version_converter.py
@@ -60,7 +60,7 @@ def convert_properties(self):
             if "sprite_object" in obj:
                 obj.coa_tools["sprite_object"] = True
                 del obj["sprite_object"]
-            for prop_name in obj.keys():
+            for prop_name in list(obj.keys()):
                 if "coa_" in prop_name and "coa_tools" not in prop_name:
                     prop_name_new = prop_name.split("coa_")[1]
                     obj.coa_tools[prop_name_new] = obj[prop_name]
@@ -173,4 +173,4 @@ def execute(self, context):
         self.convert_sprite_objects()
         self.set_shading()
         context.scene.coa_tools.deprecated_data_found = False
-        return {"FINISHED"}
\ No newline at end of file
+        return {"FINISHED"}