DynamoDB Service Integration, UpdateItem with Numeric parameter problem

Situation:

• DynamoDB Service Integration
• UpdateItem Task
• Table Column is numeric
• Parameter value is numeric
• Parameter is passed in using the numeric output of the previous state

Fails with Error Message:
An error occurred while executing the state 'TaskName' (entered at the event id #1). The Parameters '{"TableName":"SampleTable","Key":{"HashKey":{"S":"TestKey"}},"UpdateExpression":"SET NumericColumn=:numericValue","ExpressionAttributeValues":{":numericValue":{"N":100}}}' could not be used to start the Task: The value for the field 'N' must be a STRING

Notes

• it has substituted 100 for the :numericValue expression attribute value.
• if I hard-code in "100" for the :numericValue expression attribute value, I do not receive an error.

Questions
My workaround is to update the output from my previous step lambda function to return a string rather than numeric result. Is there a better way for me to accomplish this?

Sample Input

{
    "number": 100
}

Sample Task

{
    "Type": "Task",
    "Resource": "arn:aws:states:::dynamodb:updateItem",
    "Parameters": {
        "TableName": "SampleTable",
        "Key": {
            "HashKey": {
                "S.$": "$.hashKey"
            }
        },
        "UpdateExpression": "set NumericColumn = :numericValue",
        "ExpressionAttributeValues": {
            ":numericValue": {
                "N.$": "$.number"
            }
        }
    },
    "Next": "NextTask"
}