diff --git a/CHANGELOG.md b/CHANGELOG.md
index e8cbdae..61586e7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,7 +1,8 @@
 # CHANGELOG
 
-## 4.0.6
+## 4.0.7
 
+- Fix directory parsing for the file storage.
 - Add `WebCookieJar` to convenient Web usages instead of throwing exceptions.
 
 ## 4.0.5
diff --git a/lib/src/file_storage.dart b/lib/src/file_storage.dart
index 66e2362..3e72b26 100644
--- a/lib/src/file_storage.dart
+++ b/lib/src/file_storage.dart
@@ -1,5 +1,6 @@
 import 'dart:typed_data';
 
+import 'package:meta/meta.dart';
 import 'package:universal_io/io.dart' show Directory, File;
 
 import 'storage.dart';
@@ -17,13 +18,23 @@ class FileStorage implements Storage {
   /// A storage can be used across different jars, so this cannot be final.
   late String _currentDirectory;
 
+  /// {@nodoc}
+  @visibleForTesting
+  String get currentDirectory => _currentDirectory;
+
   String? Function(Uint8List list)? readPreHandler;
   List<int> Function(String value)? writePreHandler;
 
   @override
   Future<void> init(bool persistSession, bool ignoreExpires) async {
-    // 4 indicates v4 starts to use a new path.
-    final StringBuffer sb = StringBuffer(dir ?? '.cookies/4/')
+    final String baseDir;
+    if (dir != null) {
+      baseDir = Uri.directory(dir!).toString().replaceFirst('file://', '');
+    } else {
+      // 4 indicates v4 starts to use a new path.
+      baseDir = '.cookies/4/';
+    }
+    final StringBuffer sb = StringBuffer(baseDir)
       ..write('ie${ignoreExpires ? 1 : 0}')
       ..write('_ps${persistSession ? 1 : 0}')
       ..write('/');
diff --git a/pubspec.yaml b/pubspec.yaml
index bdca496..3647ad9 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: cookie_jar
 description: A cookie manager for http requests in Dart, help you to deal with the cookie policies and persistence.
-version: 4.0.6
+version: 4.0.7
 repository: https://github.com/flutterchina/cookie_jar
 issue_tracker: https://github.com/flutterchina/cookie_jar/issues
 
@@ -8,6 +8,7 @@ environment:
   sdk: '>=2.15.0 <3.0.0'
 
 dependencies:
+  meta: ^1.5.0
   universal_io: ^2.2.0
 
 dev_dependencies:
diff --git a/test/cookie_jar_test.dart b/test/cookie_jar_test.dart
index ff21613..dfecece 100644
--- a/test/cookie_jar_test.dart
+++ b/test/cookie_jar_test.dart
@@ -143,22 +143,22 @@ void main() async {
       final cookies = <Cookie>[
         Cookie('JSESSIONID', 'wendux')..domain = '.mozilla.org',
       ];
-      await cj.saveFromResponse(Uri.parse('http://www.mozilla.org/'), cookies);
+      await cj.saveFromResponse(Uri.parse('https://www.mozilla.org/'), cookies);
 
       final results1 =
-          await cj.loadForRequest(Uri.parse('http://mozilla.org/'));
+          await cj.loadForRequest(Uri.parse('https://mozilla.org/'));
       expect(results1.length, 1);
 
       final results2 =
-          await cj.loadForRequest(Uri.parse('http://developer.mozilla.org/'));
+          await cj.loadForRequest(Uri.parse('https://developer.mozilla.org/'));
       expect(results2.length, 1);
 
       final results3 =
-          await cj.loadForRequest(Uri.parse('http://fakemozilla.org/'));
+          await cj.loadForRequest(Uri.parse('https://fakemozilla.org/'));
       expect(results3.length, 0);
 
       final results4 =
-          await cj.loadForRequest(Uri.parse('http://mozilla.org.com/'));
+          await cj.loadForRequest(Uri.parse('https://mozilla.org.com/'));
       expect(results4.length, 0);
     });
 
@@ -167,16 +167,16 @@ void main() async {
       final cookies = <Cookie>[
         Cookie('JSESSIONID', 'wendux')..domain = '.mozilla.org',
       ];
-      await cj.saveFromResponse(Uri.parse('http://www.mozilla.org/'), cookies);
+      await cj.saveFromResponse(Uri.parse('https://www.mozilla.org/'), cookies);
 
-      await cj.delete(Uri.parse('http://www.fakemozilla.org/'), true);
+      await cj.delete(Uri.parse('https://www.fakemozilla.org/'), true);
       final results1 =
-          await cj.loadForRequest(Uri.parse('http://www.mozilla.org/'));
+          await cj.loadForRequest(Uri.parse('https://www.mozilla.org/'));
       expect(results1.length, 1);
 
-      await cj.delete(Uri.parse('http://developer.mozilla.org/'), true);
+      await cj.delete(Uri.parse('https://developer.mozilla.org/'), true);
       final results2 =
-          await cj.loadForRequest(Uri.parse('http://www.mozilla.org/'));
+          await cj.loadForRequest(Uri.parse('https://www.mozilla.org/'));
       expect(results2.length, 0);
     });
 
@@ -272,4 +272,25 @@ void main() async {
     final otherResults = await otherCj.loadForRequest(uri);
     expect(otherResults, isEmpty);
   });
+
+  group('FileStorage', () {
+    test('Parsed directory correctly', () async {
+      final s1 = FileStorage('./test/cookies');
+      final s2 = FileStorage('./test/cookies/');
+      final s3 = FileStorage('/test/cookies');
+      final s4 = FileStorage('/test/cookies/');
+      // Silence s3 and s4 because those directories
+      // won't have permission to create.
+      await Future.wait([
+        s1.init(true, false),
+        s2.init(true, false),
+        s3.init(true, false).catchError((_) {}),
+        s4.init(true, false).catchError((_) {}),
+      ]);
+      expect(s1.currentDirectory, 'test/cookies/ie0_ps1/');
+      expect(s2.currentDirectory, 'test/cookies/ie0_ps1/');
+      expect(s3.currentDirectory, '/test/cookies/ie0_ps1/');
+      expect(s4.currentDirectory, '/test/cookies/ie0_ps1/');
+    });
+  });
 }