diff --git a/changelog.md b/changelog.md
index 60beaf4..686b211 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,7 +1,9 @@
 # Changelog
 
-v0.0.9:
+v0.0.10:
+- relaxed Pydantic requirement to `>=1.9`
 
+v0.0.9:
 - Pydantic bumped to `1.10`
 - Bug Fix: Categorical constraints (`exact_set`, `oneof`, `include`) now can keeo `int` and `float` values. That expands to legacy schemas as well.
 
diff --git a/poetry.lock b/poetry.lock
index f09058d..b0a6490 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1196,14 +1196,14 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
 [[package]]
 name = "pydantic"
-version = "1.10.7"
+version = "1.9.1"
 description = "Data validation and settings management using python type hints"
 category = "main"
 optional = false
-python-versions = ">=3.7"
+python-versions = ">=3.6.1"
 
 [package.dependencies]
-typing-extensions = ">=4.2.0"
+typing-extensions = ">=3.7.4.3"
 
 [package.extras]
 dotenv = ["python-dotenv (>=0.10.4)"]
@@ -1693,7 +1693,7 @@ yaml = ["PyYAML"]
 [metadata]
 lock-version = "1.1"
 python-versions = ">=3.7.1,<4.0"
-content-hash = "c9f47bf3bfecb7360120114b02946d8ab9ff76ec17e9fc198678f11f0bf16e82"
+content-hash = "a2cc1b16112871253e2573a6f68cc26fa874ff18699f92846c1f899acbeaa269"
 
 [metadata.files]
 anyio = [
@@ -2418,42 +2418,41 @@ pycparser = [
     {file = "pycparser-2.21.tar.gz", hash = "sha256:e644fdec12f7872f86c58ff790da456218b10f863970249516d60a5eaca77206"},
 ]
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diff --git a/pyproject.toml b/pyproject.toml
index 7db9969..440006c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "dfschema"
-version = "0.0.9"
+version = "0.0.10"
 description = "lightweight pandas.DataFrame schema"
 authors = ["Philipp <philippk@zillowgroup.com>"]
 readme = "README.md"
@@ -13,7 +13,7 @@ python = ">=3.7.1,<4.0"
 pandas = "^1.2.4"
 sqlalchemy = {version = "1.*", optional = true}
 pandera = {version = "^0.6", optional = true}
-pydantic = ">1.10"
+pydantic = ">=1.9"
 typer = {version = "^0.6.1", optional = true}
 PyYAML = {version = "^6.0", optional = true}