Sourced from fastapi's releases.

0.119.0

FastAPI now (temporarily) supports both Pydantic v2 models and pydantic.v1 models at the same time in the same app, to make it easier for any FastAPI apps still using Pydantic v1 to gradually but quickly migrate to Pydantic v2.

from fastapi import FastAPI
from pydantic import BaseModel as BaseModelV2
from pydantic.v1 import BaseModel
class Item(BaseModel):

name: str

description: str | None = None
class ItemV2(BaseModelV2):

title: str

summary: str | None = None
app = FastAPI()
@​app.post("/items/", response_model=ItemV2)

def create_item(item: Item):

return {"title": item.name, "summary": item.description}

Adding this feature was a big effort with the main objective of making it easier for the few applications still stuck in Pydantic v1 to migrate to Pydantic v2.

And with this, support for Pydantic v1 is now deprecated and will be removed from FastAPI in a future version soon.

Note: have in mind that the Pydantic team already stopped supporting Pydantic v1 for recent versions of Python, starting with Python 3.14.

You can read in the docs more about how to Migrate from Pydantic v1 to Pydantic v2.

Features

• ✨ Add support for from pydantic.v1 import BaseModel, mixed Pydantic v1 and v2 models in the same app. PR #14168 by @​tiangolo.

• 2e721e1 🔖 Release version 0.119.0
• fc7a068 📝 Update release notes
• 3a3879b 📝 Update release notes
• d34918a ✨ Add support for from pydantic.v1 import BaseModel, mixed Pydantic v1 and ...
• 352dbef 🔖 Release version 0.118.3
• 96e7d6e 📝 Update release notes
• 3611c3f ⬆️ Add support for Python 3.14 (#14165)
• 942fce3 🔖 Release version 0.118.2
• 13b067c 📝 Update release notes
• 185cecd 🐛 Fix tagged discriminated union not recognized as body field (#12942)
• Additional commits viewable in compare view

Sourced from uvicorn's releases.

Version 0.38.0

What's Changed

• Support Python 3.14 by @​Kludex in Kludex/uvicorn#2723

---

New Contributors

• @​NGANAMODEIJunior made their first contribution in Kludex/uvicorn#2713

Full Changelog: https://github.com/Kludex/uvicorn/compare/0.37.0...0.38.0

Sourced from uvicorn's changelog.

0.38.0 (October 18, 2025)

Added

• Support Python 3.14 (#2723)

0.37.0 (September 23, 2025)

Added

• Add --timeout-worker-healthcheck option (#2711)
• Add os.PathLike[str] type to ssl_ca_certs (#2676)

0.36.1 (September 23, 2025)

Fixed

• Raise an exception when calling removed Config.setup_event_loop() (#2709)

0.36.0 (September 20, 2025)

Added

• Support custom IOLOOPs (#2435)
• Allow to provide importable string in --http, --ws and --loop (#2658)

0.35.0 (June 28, 2025)

Added

• Add WebSocketsSansIOProtocol (#2540)

Changed

• Refine help message for option --proxy-headers (#2653)

0.34.3 (June 1, 2025)

Fixed

• Don't include cwd() when non-empty --reload-dirs is passed (#2598)
• Apply get_client_addr formatting to WebSocket logging (#2636)

0.34.2 (April 19, 2025)

Fixed

• Flush stdout buffer on Windows to trigger reload (#2604)

0.34.1 (April 13, 2025)

... (truncated)

• 3850ad6 Version 0.38.0 (#2733)
• 9b3f17a Support Python 3.14 (#2723)
• ce79f95 Revert "Add Marcelo Trylesinski to the license (#2699)" (#2730)
• dbf8797 docs: add social icons (#2728)
• 58f28be Add section about event loop (#2725)
• 93d9510 Bump docs dependencies (#2724)
• 9b1c6c4 Move Marcelo Trylesinski to maintainers in pyproject.toml (#2719)
• 57a61d8 Add discord to README (#2718)
• 7ef5f9f chore(deps): bump astral-sh/setup-uv from 6.7.0 to 6.8.0 (#2717)
• 6d26d88 Update pyproject.toml for PEP639 compliance (#2713)
• See full diff in compare view

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