diff --git a/src/index.ts b/src/index.ts
index 9b6e480..76aba42 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -15,11 +15,7 @@ const generateCommand = () => {
         .choices(['HTML', 'JSON', 'CSV'])
         .default('HTML')
     )
-  .requiredOption(
-    '--excludes <patterns...>',
-    'exclude patterns is separated by a comma. example: .test.ts$,.spec.ts$',
-    '$^'
-  )
+    .option('--excludes <patterns...>', 'exclude patterns is separated by a comma. example: .test.ts$ .spec.ts$')
     .requiredOption('--matches <pattern>', 'match patterns. example: .ts$', '.*')
     .option(
       '-o, --outputReportPath <path>',
@@ -32,7 +28,7 @@ Fo  r HTML or CSV, specify the directory, and for JSON, specify the file.`
       const outputReportPath = options.outputReportPath ?? (options.outputFormat === 'JSON' ? null : './sabik_report');
       const outputPath = outputReportPath !== null ? resolve(outputReportPath) : null;
       const analyzedTarget = resolve(targetPath ?? './');
-    const excludes = (<string>options.excludes).split(',').map((row) => new RegExp(row));
+      const excludes = (<string[]>options.excludes ?? ['$^']).map((row) => new RegExp(row));
       const matches = new RegExp(options.matches);
 
       if (!fs.existsSync(analyzedTarget)) {