Updated to the latest version but it still ignore the parameter:
predictor.predict({
    'inputs': "Can you please let us know more details about your",
    'parameters': {"min_length":1000}
})

output:
[{'generated_text': 'Can you please let us know more details about your account?\n\nHello,\nI am interested in the above-mentioned company and I have read some very interesting articles about it. I am interested in starting the work. Please let me know if'}]```