diff --git a/CHANGELOG.md b/CHANGELOG.md
index fb810841..a38d8958 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+### [1.10.1](https://www.github.com/googleapis/proto-plus-python/compare/v1.10.0...v1.10.1) (2020-10-08)
+
+
+### Bug Fixes
+
+* accessing an unset struct_pb2.Value field does not raise ([#140](https://www.github.com/googleapis/proto-plus-python/issues/140)) ([d045cbf](https://www.github.com/googleapis/proto-plus-python/commit/d045cbf058cbb8f4ca98dd06741270fcaee865be))
+* add LICENSE and tests to package ([#146](https://www.github.com/googleapis/proto-plus-python/issues/146)) ([815c943](https://www.github.com/googleapis/proto-plus-python/commit/815c9439a1dadb2d4111784eb18ba673ce6e6cc2))
+
 ## [1.10.0](https://www.github.com/googleapis/proto-plus-python/compare/v1.9.1...v1.10.0) (2020-09-24)
 
 
diff --git a/MANIFEST.in b/MANIFEST.in
new file mode 100644
index 00000000..e6c96660
--- /dev/null
+++ b/MANIFEST.in
@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright 2020 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+include README.rst LICENSE
+recursive-include tests *
+global-exclude *.py[co]
+global-exclude __pycache__
\ No newline at end of file
diff --git a/proto/marshal/rules/struct.py b/proto/marshal/rules/struct.py
index 53ef34fa..27dfaf56 100644
--- a/proto/marshal/rules/struct.py
+++ b/proto/marshal/rules/struct.py
@@ -29,11 +29,15 @@ def __init__(self, *, marshal):
     def to_python(self, value, *, absent: bool = None):
         """Coerce the given value to the appropriate Python type.
 
-        Note that setting ``null_value`` is distinct from not setting
-        a value, and the absent value will raise an exception.
+        Note that both NullValue and absent fields return None.
+        In order to disambiguate between these two options,
+        use containment check,
+        E.g.
+        "value" in foo
+        which is True for NullValue and False for an absent value.
         """
         kind = value.WhichOneof("kind")
-        if kind == "null_value":
+        if kind == "null_value" or absent:
             return None
         if kind == "bool_value":
             return bool(value.bool_value)
@@ -49,7 +53,9 @@ def to_python(self, value, *, absent: bool = None):
             return self._marshal.to_python(
                 struct_pb2.ListValue, value.list_value, absent=False,
             )
-        raise AttributeError
+        # If more variants are ever added, we want to fail loudly
+        # instead of tacitly returning None.
+        raise ValueError("Unexpected kind: %s" % kind)  # pragma: NO COVER
 
     def to_proto(self, value) -> struct_pb2.Value:
         """Return a protobuf Value object representing this value."""
diff --git a/setup.py b/setup.py
index 4ce2e91e..695611a6 100644
--- a/setup.py
+++ b/setup.py
@@ -17,7 +17,7 @@
 
 from setuptools import find_packages, setup
 
-version = "1.10.0"
+version = "1.10.1"
 
 PACKAGE_ROOT = os.path.abspath(os.path.dirname(__file__))
 
diff --git a/tests/conftest.py b/tests/conftest.py
index 7e7265f7..b60b91d2 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import imp
+import importlib
 from unittest import mock
 
 from google.protobuf import descriptor_pool
@@ -76,11 +76,11 @@ def pytest_runtest_setup(item):
     # If the marshal had previously registered the old message classes,
     # then reload the appropriate modules so the marshal is using the new ones.
     if "wrappers_pb2" in reloaded:
-        imp.reload(rules.wrappers)
+        importlib.reload(rules.wrappers)
     if "struct_pb2" in reloaded:
-        imp.reload(rules.struct)
+        importlib.reload(rules.struct)
     if reloaded.intersection({"timestamp_pb2", "duration_pb2"}):
-        imp.reload(rules.dates)
+        importlib.reload(rules.dates)
 
 
 def pytest_runtest_teardown(item):
diff --git a/tests/test_marshal_types_struct.py b/tests/test_marshal_types_struct.py
index 82a40c22..914730c5 100644
--- a/tests/test_marshal_types_struct.py
+++ b/tests/test_marshal_types_struct.py
@@ -30,6 +30,13 @@ class Foo(proto.Message):
     assert Foo(value=True).value is True
 
 
+def test_value_absent():
+    class Foo(proto.Message):
+        value = proto.Field(struct_pb2.Value, number=1)
+
+    assert Foo().value is None
+
+
 def test_value_primitives_rmw():
     class Foo(proto.Message):
         value = proto.Field(struct_pb2.Value, number=1)
@@ -158,7 +165,7 @@ class Foo(proto.Message):
         value = proto.Field(struct_pb2.Value, number=1)
 
     foo = Foo()
-    assert not hasattr(foo, "value")
+    assert "value" not in foo
 
 
 def test_list_value_read():