akamai edgeworkers upload failed when bundle.tgz size is over 128KB

[takashito]

akamai edgeworkers upload --bundle ./dist/bundle.tgz $npm_package_ewid

TypeError: preparedBody.substring is not a function
at Object.contentHash (/Users/taito/.akamai-cli/src/cli-edgeworkers/node_modules/edgegrid/src/helpers.js:57:37)
at Object.dataToSign (/Users/taito/.akamai-cli/src/cli-edgeworkers/node_modules/edgegrid/src/helpers.js:78:14)
at Object.signRequest (/Users/taito/.akamai-cli/src/cli-edgeworkers/node_modules/edgegrid/src/helpers.js:146:39)
at makeAuthHeader (/Users/taito/.akamai-cli/src/cli-edgeworkers/node_modules/edgegrid/src/auth.js:40:58)
at Object.generateAuth (/Users/taito/.akamai-cli/src/cli-edgeworkers/node_modules/edgegrid/src/auth.js:65:37)
at EdgeGrid.auth (/Users/taito/.akamai-cli/src/cli-edgeworkers/node_modules/edgegrid/src/api.js:69:23)
at /Users/taito/.akamai-cli/src/cli-edgeworkers/bin/src/cli-httpRequest.js:52:18
at new Promise ()
at servicePromise (/Users/taito/.akamai-cli/src/cli-edgeworkers/bin/src/cli-httpRequest.js:51:16)
at Object.sendEdgeRequest (/Users/taito/.akamai-cli/src/cli-edgeworkers/bin/src/cli-httpRequest.js:85:65)
npm ERR! code 1
npm ERR! path /Users/taito/Google Drive/#00 Development/edgeworker/ew-graphql
npm ERR! command failed
npm ERR! command sh -c akamai edgeworkers upload --bundle ./dist/bundle.tgz $npm_package_ewid

npm ERR! A complete log of this run can be found in:
npm ERR! /Users/taito/.npm/_logs/2021-06-05T12_17_40_799Z-debug.log
ERROR: "upload" exited with 1.
error Command failed with exit code 1.

looks like maxBody size is set to 128KB.
module.exports = {
generateAuth: function(request, clientToken, clientSecret, accessToken, host, maxBody, guid, timestamp) {
maxBody = maxBody || 131072;
guid = guid || uuid.v4();
timestamp = timestamp || helpers.createTimestamp();