diff --git a/src/substrait/__init__.py b/src/substrait/__init__.py
index 7c1b41b..d0f1b33 100644
--- a/src/substrait/__init__.py
+++ b/src/substrait/__init__.py
@@ -3,6 +3,6 @@
 except ImportError:
     pass
 
-__substrait_version__ = "0.49.0"
-__substrait_hash__ = "fcf0f76"
+__substrait_version__ = "0.50.0"
+__substrait_hash__ = "7dbbf04"
 __minimum_substrait_version__ = "0.30.0"
diff --git a/src/substrait/gen/proto/extensions/extensions_pb2.py b/src/substrait/gen/proto/extensions/extensions_pb2.py
index 7051f4d..d82756e 100644
--- a/src/substrait/gen/proto/extensions/extensions_pb2.py
+++ b/src/substrait/gen/proto/extensions/extensions_pb2.py
@@ -5,7 +5,7 @@
 from google.protobuf import symbol_database as _symbol_database
 _sym_db = _symbol_database.Default()
 from google.protobuf import any_pb2 as google_dot_protobuf_dot_any__pb2
-DESCRIPTOR = _descriptor_pool.Default().AddSerializedFile(b'\n!proto/extensions/extensions.proto\x12\x10proto.extensions\x1a\x19google/protobuf/any.proto"X\n\x12SimpleExtensionURI\x120\n\x14extension_uri_anchor\x18\x01 \x01(\rR\x12extensionUriAnchor\x12\x10\n\x03uri\x18\x02 \x01(\tR\x03uri"\xa7\x06\n\x1aSimpleExtensionDeclaration\x12c\n\x0eextension_type\x18\x01 \x01(\x0b2:.proto.extensions.SimpleExtensionDeclaration.ExtensionTypeH\x00R\rextensionType\x12\x7f\n\x18extension_type_variation\x18\x02 \x01(\x0b2C.proto.extensions.SimpleExtensionDeclaration.ExtensionTypeVariationH\x00R\x16extensionTypeVariation\x12o\n\x12extension_function\x18\x03 \x01(\x0b2>.proto.extensions.SimpleExtensionDeclaration.ExtensionFunctionH\x00R\x11extensionFunction\x1a|\n\rExtensionType\x126\n\x17extension_uri_reference\x18\x01 \x01(\rR\x15extensionUriReference\x12\x1f\n\x0btype_anchor\x18\x02 \x01(\rR\ntypeAnchor\x12\x12\n\x04name\x18\x03 \x01(\tR\x04name\x1a\x98\x01\n\x16ExtensionTypeVariation\x126\n\x17extension_uri_reference\x18\x01 \x01(\rR\x15extensionUriReference\x122\n\x15type_variation_anchor\x18\x02 \x01(\rR\x13typeVariationAnchor\x12\x12\n\x04name\x18\x03 \x01(\tR\x04name\x1a\x88\x01\n\x11ExtensionFunction\x126\n\x17extension_uri_reference\x18\x01 \x01(\rR\x15extensionUriReference\x12\'\n\x0ffunction_anchor\x18\x02 \x01(\rR\x0efunctionAnchor\x12\x12\n\x04name\x18\x03 \x01(\tR\x04nameB\x0e\n\x0cmapping_type"\x85\x01\n\x11AdvancedExtension\x128\n\x0coptimization\x18\x01 \x01(\x0b2\x14.google.protobuf.AnyR\x0coptimization\x126\n\x0benhancement\x18\x02 \x01(\x0b2\x14.google.protobuf.AnyR\x0benhancementB#\n\x0eio.proto.protoP\x01\xaa\x02\x0eProto.Protobufb\x06proto3')
+DESCRIPTOR = _descriptor_pool.Default().AddSerializedFile(b'\n!proto/extensions/extensions.proto\x12\x10proto.extensions\x1a\x19google/protobuf/any.proto"X\n\x12SimpleExtensionURI\x120\n\x14extension_uri_anchor\x18\x01 \x01(\rR\x12extensionUriAnchor\x12\x10\n\x03uri\x18\x02 \x01(\tR\x03uri"\xa7\x06\n\x1aSimpleExtensionDeclaration\x12c\n\x0eextension_type\x18\x01 \x01(\x0b2:.proto.extensions.SimpleExtensionDeclaration.ExtensionTypeH\x00R\rextensionType\x12\x7f\n\x18extension_type_variation\x18\x02 \x01(\x0b2C.proto.extensions.SimpleExtensionDeclaration.ExtensionTypeVariationH\x00R\x16extensionTypeVariation\x12o\n\x12extension_function\x18\x03 \x01(\x0b2>.proto.extensions.SimpleExtensionDeclaration.ExtensionFunctionH\x00R\x11extensionFunction\x1a|\n\rExtensionType\x126\n\x17extension_uri_reference\x18\x01 \x01(\rR\x15extensionUriReference\x12\x1f\n\x0btype_anchor\x18\x02 \x01(\rR\ntypeAnchor\x12\x12\n\x04name\x18\x03 \x01(\tR\x04name\x1a\x98\x01\n\x16ExtensionTypeVariation\x126\n\x17extension_uri_reference\x18\x01 \x01(\rR\x15extensionUriReference\x122\n\x15type_variation_anchor\x18\x02 \x01(\rR\x13typeVariationAnchor\x12\x12\n\x04name\x18\x03 \x01(\tR\x04name\x1a\x88\x01\n\x11ExtensionFunction\x126\n\x17extension_uri_reference\x18\x01 \x01(\rR\x15extensionUriReference\x12\'\n\x0ffunction_anchor\x18\x02 \x01(\rR\x0efunctionAnchor\x12\x12\n\x04name\x18\x03 \x01(\tR\x04nameB\x0e\n\x0cmapping_type"\x85\x01\n\x11AdvancedExtension\x128\n\x0coptimization\x18\x01 \x03(\x0b2\x14.google.protobuf.AnyR\x0coptimization\x126\n\x0benhancement\x18\x02 \x01(\x0b2\x14.google.protobuf.AnyR\x0benhancementB#\n\x0eio.proto.protoP\x01\xaa\x02\x0eProto.Protobufb\x06proto3')
 _builder.BuildMessageAndEnumDescriptors(DESCRIPTOR, globals())
 _builder.BuildTopDescriptorsAndMessages(DESCRIPTOR, 'proto.extensions.extensions_pb2', globals())
 if _descriptor._USE_C_DESCRIPTORS == False:
diff --git a/src/substrait/gen/proto/extensions/extensions_pb2.pyi b/src/substrait/gen/proto/extensions/extensions_pb2.pyi
index e7670ac..2317af3 100644
--- a/src/substrait/gen/proto/extensions/extensions_pb2.pyi
+++ b/src/substrait/gen/proto/extensions/extensions_pb2.pyi
@@ -3,8 +3,10 @@
 isort:skip_file
 SPDX-License-Identifier: Apache-2.0"""
 import builtins
+import collections.abc
 import google.protobuf.any_pb2
 import google.protobuf.descriptor
+import google.protobuf.internal.containers
 import google.protobuf.message
 import sys
 if sys.version_info >= (3, 8):
@@ -133,7 +135,7 @@ class AdvancedExtension(google.protobuf.message.Message):
     ENHANCEMENT_FIELD_NUMBER: builtins.int
 
     @property
-    def optimization(self) -> google.protobuf.any_pb2.Any:
+    def optimization(self) -> google.protobuf.internal.containers.RepeatedCompositeFieldContainer[google.protobuf.any_pb2.Any]:
         """An optimization is helpful information that don't influence semantics. May
         be ignored by a consumer.
         """
@@ -142,10 +144,10 @@ class AdvancedExtension(google.protobuf.message.Message):
     def enhancement(self) -> google.protobuf.any_pb2.Any:
         """An enhancement alter semantics. Cannot be ignored by a consumer."""
 
-    def __init__(self, *, optimization: google.protobuf.any_pb2.Any | None=..., enhancement: google.protobuf.any_pb2.Any | None=...) -> None:
+    def __init__(self, *, optimization: collections.abc.Iterable[google.protobuf.any_pb2.Any] | None=..., enhancement: google.protobuf.any_pb2.Any | None=...) -> None:
         ...
 
-    def HasField(self, field_name: typing_extensions.Literal['enhancement', b'enhancement', 'optimization', b'optimization']) -> builtins.bool:
+    def HasField(self, field_name: typing_extensions.Literal['enhancement', b'enhancement']) -> builtins.bool:
         ...
 
     def ClearField(self, field_name: typing_extensions.Literal['enhancement', b'enhancement', 'optimization', b'optimization']) -> None:
diff --git a/third_party/substrait b/third_party/substrait
index fcf0f76..7dbbf04 160000
--- a/third_party/substrait
+++ b/third_party/substrait
@@ -1 +1 @@
-Subproject commit fcf0f762a3d39eabadf2f2b507ff803aadcb123e
+Subproject commit 7dbbf0468083d932a61b9c720700bd6083558fa9