EfficientNet MBBlock Expansion Error

In Machine-Learning-Collection/ML/Pytorch/CNN_architectures /pytorch_efficientnet.py,

I believe the correct implementation of channel expansion in the EfficientNet MBBlock should use a kernel size of 1.

if self.expand: self.expand_conv = CNNBlock( in_channels, hidden_dim, kernel_size=3, stride=1, padding=1, )