FastAPI cannot catch exception with status code 500

Question

I'm using Fastapi "0.104.1". I'm able to catch every exception raised except for Internal Server Error 500. Here is my code: main.py

app = FastAPI(title='App')

app.add_exception_handler(400, exception_handler.exception_400_handler)
app.add_exception_handler(500, exception_handler.exception_500_handler)

exception_handler.py

async def exception_400_handler(request, exc):
    return JSONResponse(
        status_code=status.HTTP_400_BAD_REQUEST,
        content=jsonable_encoder({"error": {"message": exc.detail, "type": status.HTTP_400_BAD_REQUEST}}),
    )

async def exception_500_handler(request, exc):
    return JSONResponse(
        status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
        content=jsonable_encoder({"error": {"message": exc.detail, "type": status.HTTP_500_INTERNAL_SERVER_ERROR}}),
    )

As said before, I'm able to catch exception with status 400, but not with status 500. Example:

raise HTTPException(status_code=400, detail="Item not found") # enter in the exception_400_handler
raise HTTPException(status_code=500, detail="Error on update item") # NOT enter in the exception_500_handler

Thanks for any help