diff --git a/tools/mo/openvino/tools/mo/back/preprocessing.py b/tools/mo/openvino/tools/mo/back/preprocessing.py
index 5c46545d3c3..2e3f523c38b 100644
--- a/tools/mo/openvino/tools/mo/back/preprocessing.py
+++ b/tools/mo/openvino/tools/mo/back/preprocessing.py
@@ -6,9 +6,6 @@ import logging as log
 
 from openvino.tools.mo.utils.error import Error
 from openvino.tools.mo.utils.utils import refer_to_faq_msg
-
-import numpy as np
-
 from openvino.preprocess import PrePostProcessor        # pylint: disable=no-name-in-module,import-error
 # pylint: disable=no-name-in-module,import-error
 from openvino.runtime import Model, Layout, PartialShape, layout_helpers
@@ -25,7 +22,7 @@ def update_mean_scale_to_dict(input_nodes: list, mean_scale_val, scale):
         if len(mean_scale_val) != len(input_nodes):
             raise Error('Numbers of inputs and mean/scale values do not match. ' + refer_to_faq_msg(61))
 
-        data = np.copy(mean_scale_val)
+        data = mean_scale_val
         mean_scale_val = {}
         for idx, node in enumerate(input_nodes):
             names_list = list(node.get_tensor().get_names())