diff --git a/src/lsfnd.ts b/src/lsfnd.ts
index 94d8e04..ce745bb 100644
--- a/src/lsfnd.ts
+++ b/src/lsfnd.ts
@@ -245,7 +245,14 @@ export async function ls(
       + (Array.isArray(options) ? 'array' : typeof options));
   }
 
-  // Resolve its absolute and relative path
+  // Check and resolve the `rootDir` option
+  if (options.rootDir && (options.rootDir instanceof URL
+      || (typeof options.rootDir === 'string' && /^[a-zA-Z]+:/.test(options.rootDir))
+  )) {
+    options.rootDir = fileUrlToPath(options.rootDir);
+  }
+
+  // Resolve the absolute and relative of the dirpath argument
   absdirpath = path.isAbsolute(<StringPath> dirpath)
     ? <StringPath> dirpath
     : path.posix.resolve(<StringPath> dirpath);
diff --git a/types/index.d.ts b/types/index.d.ts
index 0ee1cb7..3c0c51b 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -130,7 +130,7 @@ export declare interface LsOptions {
    * @defaultValue `'.'` or `process.cwd()`
    * @since        1.0.0
    */
-  rootDir?: StringPath | undefined;
+  rootDir?: StringPath | URL | undefined;
   /**
    * Determines whether to return absolute paths for all entries.
    *
@@ -249,7 +249,7 @@ export declare interface DefaultLsOptions {
   readonly recursive: false;
   readonly match: RegExp;
   readonly exclude: undefined;
-  readonly rootDir: StringPath;
+  readonly rootDir: StringPath | URL;
   readonly absolute: false;
   readonly basename: false;
 }