diff --git a/bin/checkLicenses.mjs b/bin/checkLicenses.mjs
index 05a6fd1..c337540 100755
--- a/bin/checkLicenses.mjs
+++ b/bin/checkLicenses.mjs
@@ -14,6 +14,8 @@ const cli = meow(
     Options
 	  --debug  Show full packages list
 	  --allowPackages Semi-colon separated list of packages to ignore (eg cycle@1.0.3;underscore@1.12.0)
+	  --allowList Which default list of licenses to use. Possible values: "MIT", "none". Defaults to "MIT"
+	  --allowLicenses Semi-colon separated list of licenses to allow in addition to the default list (eg GPL-3.0-only;MIT)
 `,
 	{
 		importMeta: import.meta,
@@ -32,17 +34,40 @@ const cli = meow(
 const pkgInfo = readPackageUpSync()
 const projectNameAndVersion = `${pkgInfo.packageJson.name}@${pkgInfo.packageJson.version}`
 
-// TODO - Add option driven allowList selection with a list for GPL projects
-const allowListForMit = 'MIT;BSD;ISC;Apache-2.0;CC0;CC-BY-3.0;CC-BY-4.0;Unlicense;Artistic-2.0;Python-2.0;BlueOak-1.0.0'
+const allowLists = {
+	MIT: 'MIT;BSD;ISC;Apache-2.0;CC0;CC-BY-3.0;CC-BY-4.0;Unlicense;Artistic-2.0;Python-2.0;BlueOak-1.0.0',
+	none: '',
+	// TODO - Add allowList with a list for GPL projects
+}
+
+const useAllowList = cli.flags.allowList || 'MIT'
+let allowList = ''
+if (useAllowList === 'none') {
+	allowList = allowLists.none
+} else if (useAllowList === 'MIT') {
+	allowList = allowLists.MIT
+} else {
+	console.error(`Invalid argument value: --allowList: ${useAllowList} (possible values: "MIT", "none")`)
+	process.exit(1)
+}
+if (cli.flags.allowLicenses) {
+	allowList += `;${cli.flags.allowLicenses}`
+}
 
 let excludePackages = projectNameAndVersion
 if (cli.flags.allowPackages) {
 	excludePackages += `;${cli.flags.allowPackages}`
 }
 
+if (cli.flags.debug) {
+	console.log('CLI flags', cli.flags)
+	console.log('excludePackages', excludePackages)
+	console.log('allowList', allowList)
+}
+
 checker.init({
 	start: path.resolve('.'),
-	onlyAllow: allowListForMit,
+	onlyAllow: allowList,
 	excludePackages: excludePackages,
 	summary: !cli.flags.debug
 }, (err, packages) => {