diff --git a/trame_vtk/modules/vtk/serializers/utils.py b/trame_vtk/modules/vtk/serializers/utils.py
index 28a2b11..93a8743 100644
--- a/trame_vtk/modules/vtk/serializers/utils.py
+++ b/trame_vtk/modules/vtk/serializers/utils.py
@@ -1,5 +1,6 @@
 import base64
 import hashlib
+import sys
 
 
 def rgb_float_to_hex(r, g, b):
@@ -48,7 +49,12 @@ def base64_encode(x):
 
 
 def hash_data_array(data_array):
-    hashed_bit = hashlib.md5(memoryview(data_array), usedforsecurity=False).hexdigest()
+    if sys.version_info < (3, 9):
+        hashed_bit = hashlib.md5(memoryview(data_array)).hexdigest()
+    else:
+        hashed_bit = hashlib.md5(
+            memoryview(data_array), usedforsecurity=False
+        ).hexdigest()
     type_code = array_types_mapping[data_array.GetDataType()]
     return "%s_%d%s" % (hashed_bit, data_array.GetSize(), type_code)