diff --git a/envoy.base.utils/VERSION b/envoy.base.utils/VERSION
index 0e8d5ffd8..d3532a107 100644
--- a/envoy.base.utils/VERSION
+++ b/envoy.base.utils/VERSION
@@ -1 +1 @@
-0.5.7-dev
+0.5.7
diff --git a/envoy.base.utils/envoy/base/utils/abstract/protobuf.py b/envoy.base.utils/envoy/base/utils/abstract/protobuf.py
index 999398dd4..820bb3aa4 100644
--- a/envoy.base.utils/envoy/base/utils/abstract/protobuf.py
+++ b/envoy.base.utils/envoy/base/utils/abstract/protobuf.py
@@ -9,8 +9,8 @@
 from google.protobuf import descriptor_pool as _descriptor_pool
 from google.protobuf import json_format
 from google.protobuf import (
-    message as _message,
-    message_factory as _message_factory)
+    message_factory,
+    message as _message)
 
 import abstracts
 
@@ -64,10 +64,6 @@ def __init__(self, descriptor_path: str | pathlib.Path) -> None:
     def descriptor_pool(self) -> _descriptor_pool.DescriptorPool:
         return self.protobuf_set.descriptor_pool
 
-    @cached_property
-    def message_factory(self) -> _message_factory.MessageFactory:
-        return _message_factory.MessageFactory(pool=self.descriptor_pool)
-
     @cached_property
     def protobuf_set(self) -> interface.IProtobufSet:
         return self.protobuf_set_class(self.descriptor_path)
@@ -91,7 +87,7 @@ def message(self, type_name: str) -> _message.Message:
     def message_prototype(
             self,
             type_name: str) -> Callable[[], _message.Message]:
-        return self.message_factory.GetPrototype(self.find_message(type_name))
+        return message_factory.GetMessageClass(self.find_message(type_name))
 
     def validate_fragment(
             self,
diff --git a/envoy.base.utils/tests/test_abstract_protobuf.py b/envoy.base.utils/tests/test_abstract_protobuf.py
index 1b2211a20..a95baa9c5 100644
--- a/envoy.base.utils/tests/test_abstract_protobuf.py
+++ b/envoy.base.utils/tests/test_abstract_protobuf.py
@@ -131,25 +131,6 @@ def test_protobufvalidator_descriptor_pool(patches):
     assert "descriptor_pool" not in proto_validator.__dict__
 
 
-def test_protobufvalidator_message_factory(patches):
-    proto_validator = DummyProtobufValidator("DESCRIPTOR_PATH")
-    patched = patches(
-        "_message_factory",
-        ("AProtobufValidator.descriptor_pool",
-         dict(new_callable=PropertyMock)),
-        prefix="envoy.base.utils.abstract.protobuf")
-
-    with patched as (m_factory, m_pool):
-        assert (
-            proto_validator.message_factory
-            == m_factory.MessageFactory.return_value)
-
-    assert (
-        m_factory.MessageFactory.call_args
-        == [(), dict(pool=m_pool.return_value)])
-    assert "message_factory" in proto_validator.__dict__
-
-
 def test_protobufvalidator_protobuf_set(patches):
     proto_validator = DummyProtobufValidator("DESCRIPTOR_PATH")
     patched = patches(
@@ -226,8 +207,7 @@ def test_protobufvalidator_message(patches):
 def test_protobufvalidator_message_prototype(patches):
     proto_validator = DummyProtobufValidator("DESCRIPTOR_PATH")
     patched = patches(
-        ("AProtobufValidator.message_factory",
-         dict(new_callable=PropertyMock)),
+        "message_factory",
         "AProtobufValidator.find_message",
         prefix="envoy.base.utils.abstract.protobuf")
     type_name = MagicMock()
@@ -235,10 +215,10 @@ def test_protobufvalidator_message_prototype(patches):
     with patched as (m_factory, m_find):
         assert (
             proto_validator.message_prototype(type_name)
-            == m_factory.return_value.GetPrototype.return_value)
+            == m_factory.GetMessageClass.return_value)
 
     assert (
-        m_factory.return_value.GetPrototype.call_args
+        m_factory.GetMessageClass.call_args
         == [(m_find.return_value, ), {}])
     assert (
         m_find.call_args