TypeError: expand_dims() got an unexpected keyword argument 'dim'

[forhonourlx]

def dueling_dqn(input_shape, action_size, learning_rate):
...
state_value = Lambda(lambda s: K.expand_dims(s[:, 0], dim=-1), output_shape=(action_size,))(state_value)
...

[bilal-rabbani-ai]

same issue