Can't create step function through AWS CLI: Argument list too long

Hello, Inside a DevOps process, I was creating step functions through the AWS CLI using this command:

aws stepfunctions update-state-machine --definition "$(cat definition.asl.json)" --state-machine-arn ***

But it seems that I have a very big step function now which I'm unable to upload, I'm just seeing this error: /usr/local/bin/aws: Argument list too long As the AWS CLI doesn't admit to upload the step function using file, the workflow is now not working. How can I correct this?