Overview

Starlette 0.50, released on November 1, 2025, drops Python 3.9 support.

Main Features

Python 3.9 dropped

This release now requires Python 3.10 or later, enabling the use of | type unions and match/case in the internal codebase.

python 
from starlette.applications import Starlette
from starlette.responses import JSONResponse
from starlette.routing import Route

async def home(request):
    return JSONResponse({'version': '0.50'})

app = Starlette(routes=[
    Route('/', home),
])

Sources