diff --git a/.changelog/4713.yml b/.changelog/4713.yml
new file mode 100644
index 00000000000..493ec91bbc1
--- /dev/null
+++ b/.changelog/4713.yml
@@ -0,0 +1,4 @@
+changes:
+- description: Fixed an issue where YmlSplitter attributes were being unintentionally updated.
+  type: fix
+pr_number: 4713
diff --git a/demisto_sdk/commands/split/ymlsplitter.py b/demisto_sdk/commands/split/ymlsplitter.py
index f33d4fe5832..977f0991867 100644
--- a/demisto_sdk/commands/split/ymlsplitter.py
+++ b/demisto_sdk/commands/split/ymlsplitter.py
@@ -4,6 +4,7 @@
 import os
 import re
 import shutil
+from copy import deepcopy
 from pathlib import Path
 from typing import Optional
 
@@ -129,7 +130,7 @@ def extract_to_package_format(
         yaml_out = f"{output_path}/{base_name}.yml"
         logger.debug(f"Creating yml file: {yaml_out} ...")
         if self.yml_data:
-            yaml_obj = self.yml_data.copy()
+            yaml_obj = deepcopy(self.yml_data)
         else:
             yaml_obj = get_file(self.input, raise_on_error=True)