diff --git a/docs/why.rst b/docs/why.rst
index 659f26f..6fddac8 100644
--- a/docs/why.rst
+++ b/docs/why.rst
@@ -8,7 +8,7 @@ There are number of packages out there that solve a similar problem. Here are ju
 * `flask-apispec <https://github.com/jmcarp/flask-apispec>`_
 * `Flasgger <https://github.com/rochacbruno/flasgger>`_
 
-These are all great projects, and one might work better for your use case. Flask-Rebar solves a similar problem with its own its own twist on the approach:
+These are all great projects, and one might work better for your use case. Flask-Rebar solves a similar problem with its own twist on the approach:
 
 Marshmallow for validation *and* marshaling
 -------------------------------------------
@@ -23,7 +23,7 @@ Swagger as a side effect
 
 Some approaches generate code *from* a Swagger specification, or generate Swagger from docstrings. Flask-Rebar aims to make Swagger (a.k.a. OpenAPI) a byproduct of writing application code with Marshmallow and Flask.
 
-This is really nice if you prefer the rich validation/transformation functionality of Marshmallow over Swagger's limited.
+This is really nice if you prefer the rich validation/transformation functionality of Marshmallow over Swagger's more limited set.
 
 It also alleviates the need to manually keep an API's documentation in sync with the actual application code - the schemas used by the application are the same schemas used to generate Swagger.
 
diff --git a/flask_rebar/rebar.py b/flask_rebar/rebar.py
index c5a4acd..dfaf46f 100644
--- a/flask_rebar/rebar.py
+++ b/flask_rebar/rebar.py
@@ -32,7 +32,12 @@
     TypeVar,
     Union,
 )
-from typing_extensions import ParamSpec
+
+if sys.version_info >= (3, 10):
+    from typing import ParamSpec
+else:
+    from typing_extensions import ParamSpec
+
 from werkzeug.datastructures import Headers
 from werkzeug.exceptions import HTTPException
 from werkzeug.routing import RequestRedirect
diff --git a/flask_rebar/swagger_generation/marshmallow_to_swagger.py b/flask_rebar/swagger_generation/marshmallow_to_swagger.py
index bcf751f..6c3c55c 100644
--- a/flask_rebar/swagger_generation/marshmallow_to_swagger.py
+++ b/flask_rebar/swagger_generation/marshmallow_to_swagger.py
@@ -27,7 +27,12 @@
     TypeVar,
     Union,
 )
-from typing_extensions import ParamSpec
+
+if sys.version_info >= (3, 10):
+    from typing import ParamSpec
+else:
+    from typing_extensions import ParamSpec
+
 import marshmallow as m
 from marshmallow import Schema
 from marshmallow.validate import Range
diff --git a/flask_rebar/utils/deprecation.py b/flask_rebar/utils/deprecation.py
index 92dfc1e..565634f 100644
--- a/flask_rebar/utils/deprecation.py
+++ b/flask_rebar/utils/deprecation.py
@@ -9,9 +9,14 @@
 """
 from __future__ import annotations
 import functools
+import sys
 import warnings
 from typing import Any, Callable, Dict, NamedTuple, Optional, Tuple, TypeVar, Union
-from typing_extensions import ParamSpec
+
+if sys.version_info >= (3, 10):
+    from typing import ParamSpec
+else:
+    from typing_extensions import ParamSpec
 
 from werkzeug.local import LocalProxy as module_property  # noqa
 
diff --git a/setup.py b/setup.py
index 9926389..5a8a9ad 100644
--- a/setup.py
+++ b/setup.py
@@ -22,6 +22,13 @@
     "types-setuptools==68.0.0.3",
 ]
 
+install_requires = [
+    "Flask>=1.0,<4",
+    "marshmallow>=3.0,<4",
+    "typing-extensions>=4.8,<5;python_version<'3.10'",
+    "Werkzeug>=2.2,<4",
+]
+
 if __name__ == "__main__":
     setup(
         name="flask-rebar",
@@ -36,7 +43,7 @@
         package_data={"flask_rebar": ["py.typed"]},
         include_package_data=True,
         extras_require={"dev": development, "enum": ["marshmallow-enum~=1.5"]},
-        install_requires=["Flask>=1.0,<4", "marshmallow>=3.0,<4"],
+        install_requires=install_requires,
         url="https://github.com/plangrid/flask-rebar",
         classifiers=[
             "Environment :: Web Environment",
diff --git a/tests/test_validation.py b/tests/test_validation.py
index 8715f84..53e1b2e 100644
--- a/tests/test_validation.py
+++ b/tests/test_validation.py
@@ -8,10 +8,10 @@
     :license: MIT, see LICENSE for details.
 """
 from datetime import datetime
+from importlib.metadata import version
 from unittest import TestCase
 from pytest import mark
 
-from marshmallow import __version_info__ as MARSHMALLOW_VERSION
 from marshmallow import Schema
 from marshmallow import ValidationError
 from marshmallow import fields
@@ -26,6 +26,8 @@
 from flask_rebar.validation import QueryParamList
 from tests.test_rebar import create_rebar_app
 
+MARSHMALLOW_VERSION = tuple(int(x) for x in version("marshmallow").split("."))
+
 
 class NoRequireOnDumpMixinSchema(Schema):
     optional = fields.Str()