diff --git a/.github/workflows/workflow.yml b/.github/workflows/workflow.yml
index 3c02114..88ae1c1 100644
--- a/.github/workflows/workflow.yml
+++ b/.github/workflows/workflow.yml
@@ -15,5 +15,5 @@ jobs:
   ci:
     uses: community-of-python/community-workflow/.github/workflows/preset.yml@main
     with:
-      python-version: '["3.9","3.10","3.11","3.12","3.13"]'
+      python-version: '["3.10","3.11","3.12","3.13"]'
     secrets: inherit
diff --git a/microbootstrap/instruments/health_checks_instrument.py b/microbootstrap/instruments/health_checks_instrument.py
index 78b1f75..80fe33e 100644
--- a/microbootstrap/instruments/health_checks_instrument.py
+++ b/microbootstrap/instruments/health_checks_instrument.py
@@ -1,5 +1,4 @@
 from __future__ import annotations
-import typing
 
 import typing_extensions
 
@@ -7,8 +6,8 @@
 
 
 class HealthCheckTypedDict(typing_extensions.TypedDict, total=False):
-    service_version: typing.Optional[str]  # noqa: UP045 (Litestar fails to build OpenAPI schema on Python 3.9)
-    service_name: typing.Optional[str]  # noqa: UP045 (Litestar fails to build OpenAPI schema on Python 3.9)
+    service_version: str | None
+    service_name: str | None
     health_status: bool
 
 
diff --git a/pyproject.toml b/pyproject.toml
index 33300f6..904acb2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -2,7 +2,7 @@
 name = "microbootstrap"
 description = "Package for bootstrapping new micro-services"
 readme = "README.md"
-requires-python = ">=3.9,<4"
+requires-python = ">=3.10,<4"
 keywords = [
     "python",
     "microservice",
@@ -23,7 +23,6 @@ classifiers = [
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
     "Programming Language :: Python :: 3 :: Only",
-    "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
@@ -101,13 +100,13 @@ source = "vcs"
 [tool.mypy]
 plugins = ["pydantic.mypy"]
 files = ["microbootstrap", "tests"]
-python_version = "3.9"
+python_version = "3.10"
 strict = true
 pretty = true
 show_error_codes = true
 
 [tool.ruff]
-target-version = "py39"
+target-version = "py310"
 line-length = 120
 
 [tool.ruff.format]