diff --git a/CHANGELOG.md b/CHANGELOG.md
index 50ffa3b..f5a31dd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 3.0.0
+
+- BREAKING: `isLoggedIn` now returns `Future<bool>` instead of bool
+
 ## 2.1.0
 
 - Add pre-constructed `ClientTokenInterceptor` and `UserTokenInterceptor` to `Passputter`
diff --git a/README.md b/README.md
index c97b591..471061f 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@ Easily authenticate using OAuth 2.0 client/password grants.
 Install passputter from [pub.dev](https://pub.dev/packages/passputter):
 
 ```yaml
-passputter: ^2.1.0
+passputter: ^3.0.0
 ```
 
 ## ✅ Prerequisites
diff --git a/lib/src/client_token_interceptor.dart b/lib/src/client_token_interceptor.dart
index 43f79e3..e37a95d 100644
--- a/lib/src/client_token_interceptor.dart
+++ b/lib/src/client_token_interceptor.dart
@@ -1,11 +1,9 @@
 // 📦 Package imports:
 import 'package:clock/clock.dart';
 import 'package:dio/dio.dart';
-
 // 🌎 Project imports:
 import 'package:passputter/passputter.dart';
 import 'package:passputter/src/oauth_api_interface.dart';
-import 'package:passputter/src/oauth_token.dart';
 
 /// Adds a client bearer token to the Authorization header of each request
 class ClientTokenInterceptor extends Interceptor {
diff --git a/lib/src/in_memory_token_storage.dart b/lib/src/in_memory_token_storage.dart
index 95253ac..3452ef1 100644
--- a/lib/src/in_memory_token_storage.dart
+++ b/lib/src/in_memory_token_storage.dart
@@ -1,6 +1,5 @@
 // 🌎 Project imports:
 import 'package:passputter/passputter.dart';
-import 'package:passputter/src/oauth_token.dart';
 
 /// Implementation of [TokenStorage] which stores tokens in memory.
 class InMemoryTokenStorage implements TokenStorage {
diff --git a/lib/src/passputter_impl.dart b/lib/src/passputter_impl.dart
index f303a8d..b9faa4e 100644
--- a/lib/src/passputter_impl.dart
+++ b/lib/src/passputter_impl.dart
@@ -25,7 +25,7 @@ class PassputterImpl implements Passputter {
   final String clientSecret;
 
   @override
-  bool get isLoggedIn => tokenStorage.userToken != null;
+  Future<bool> get isLoggedIn async => (await tokenStorage.userToken) != null;
 
   @override
   Future<void> logIn({
diff --git a/lib/src/passputter_interface.dart b/lib/src/passputter_interface.dart
index bcf7161..4ba7848 100644
--- a/lib/src/passputter_interface.dart
+++ b/lib/src/passputter_interface.dart
@@ -38,7 +38,7 @@ abstract class Passputter {
   }
 
   /// Whether the user is logged in.
-  bool get isLoggedIn;
+  Future<bool> get isLoggedIn;
 
   /// Log in with the given [email] and [password] credentials.
   ///
diff --git a/lib/src/token_expired_exception.dart b/lib/src/token_expired_exception.dart
index 07be17f..72e3404 100644
--- a/lib/src/token_expired_exception.dart
+++ b/lib/src/token_expired_exception.dart
@@ -1,7 +1,9 @@
 // 🌎 Project imports:
+import 'package:meta/meta.dart';
 import 'package:passputter/src/oauth_token.dart';
 
 /// Thrown when an expired [OAuthToken] is used and cannot be refreshed.
+@immutable
 class TokenExpiredException implements Exception {
   /// Constructs a [TokenExpiredException]
   const TokenExpiredException(
diff --git a/lib/src/token_storage.dart b/lib/src/token_storage.dart
index f4ac888..dbe631a 100644
--- a/lib/src/token_storage.dart
+++ b/lib/src/token_storage.dart
@@ -2,7 +2,7 @@
 import 'dart:async';
 
 // 🌎 Project imports:
-import 'oauth_token.dart';
+import 'package:passputter/src/oauth_token.dart';
 
 /// Handles storage and retrieval of [OAuthToken]s.
 abstract class TokenStorage {
diff --git a/pubspec.yaml b/pubspec.yaml
index 726e5a0..fde8d7c 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: passputter
 description: Easily authenticate using OAuth 2.0 client/password grants.
-version: 2.1.0
+version: 3.0.0
 repository: https://github.com/netsells/passputter
 
 environment:
diff --git a/test/passputter_test.dart b/test/passputter_test.dart
index 31bf2fe..35d0f20 100644
--- a/test/passputter_test.dart
+++ b/test/passputter_test.dart
@@ -1,11 +1,10 @@
 // 📦 Package imports:
 import 'package:dio/dio.dart';
 import 'package:mock_web_server/mock_web_server.dart';
-import 'package:pretty_dio_logger/pretty_dio_logger.dart';
-import 'package:test/test.dart';
-
 // 🌎 Project imports:
 import 'package:passputter/passputter.dart';
+import 'package:pretty_dio_logger/pretty_dio_logger.dart';
+import 'package:test/test.dart';
 
 void main() {
   const clientId = 'id';
diff --git a/test/src/client_token_interceptor_test.dart b/test/src/client_token_interceptor_test.dart
index 4bdecd0..124e395 100644
--- a/test/src/client_token_interceptor_test.dart
+++ b/test/src/client_token_interceptor_test.dart
@@ -2,14 +2,11 @@
 import 'package:clock/clock.dart';
 import 'package:dio/dio.dart';
 import 'package:mocktail/mocktail.dart';
-import 'package:test/test.dart';
-import 'package:time/time.dart';
-
 // 🌎 Project imports:
 import 'package:passputter/passputter.dart';
-import 'package:passputter/src/client_token_interceptor.dart';
 import 'package:passputter/src/oauth_api_interface.dart';
-import 'package:passputter/src/oauth_token.dart';
+import 'package:test/test.dart';
+import 'package:time/time.dart';
 
 class MockOAuthApi extends Mock implements OAuthApiInterface {}
 
@@ -26,7 +23,7 @@ void main() {
     tokenStorage = InMemoryTokenStorage();
     oAuthApi = MockOAuthApi();
     handler = MockHandler();
-    clock = Clock.fixed(DateTime(2021, 5, 1));
+    clock = Clock.fixed(DateTime(2021, 5));
     interceptor = ClientTokenInterceptor(
       tokenStorage: tokenStorage,
       oAuthApi: oAuthApi,
@@ -74,11 +71,13 @@ void main() {
   });
 
   test('generates header when token in TokenStorage has expired', () async {
-    await tokenStorage.saveClientToken(OAuthToken(
-      token: 'expired',
-      expiresAt: clock.now().subtract(1.hours),
-      refreshToken: null,
-    ));
+    await tokenStorage.saveClientToken(
+      OAuthToken(
+        token: 'expired',
+        expiresAt: clock.now().subtract(1.hours),
+        refreshToken: null,
+      ),
+    );
 
     when(() => oAuthApi.getClientToken(clientId: 'id', clientSecret: 'secret'))
         .thenAnswer((_) async => token);
diff --git a/test/src/in_memory_token_storage_test.dart b/test/src/in_memory_token_storage_test.dart
index ae3cb81..3d9a1ad 100644
--- a/test/src/in_memory_token_storage_test.dart
+++ b/test/src/in_memory_token_storage_test.dart
@@ -1,9 +1,8 @@
 // 📦 Package imports:
-import 'package:test/test.dart';
-
 // 🌎 Project imports:
 import 'package:passputter/src/in_memory_token_storage.dart';
 import 'package:passputter/src/oauth_token.dart';
+import 'package:test/test.dart';
 
 void main() {
   late InMemoryTokenStorage storage;
diff --git a/test/src/oauth_api_impl_test.dart b/test/src/oauth_api_impl_test.dart
index 3775b1a..d3bcf82 100644
--- a/test/src/oauth_api_impl_test.dart
+++ b/test/src/oauth_api_impl_test.dart
@@ -1,11 +1,10 @@
 // 📦 Package imports:
 import 'package:dio/dio.dart';
 import 'package:mocktail/mocktail.dart';
-import 'package:test/test.dart';
-
 // 🌎 Project imports:
 import 'package:passputter/src/oauth_api_impl.dart';
 import 'package:passputter/src/oauth_token.dart';
+import 'package:test/test.dart';
 
 class MockDio extends Mock implements Dio {}
 
diff --git a/test/src/oauth_token_test.dart b/test/src/oauth_token_test.dart
index cb01e18..fb9a23a 100644
--- a/test/src/oauth_token_test.dart
+++ b/test/src/oauth_token_test.dart
@@ -1,10 +1,9 @@
 // 📦 Package imports:
 import 'package:clock/clock.dart';
-import 'package:test/test.dart';
-import 'package:time/time.dart';
-
 // 🌎 Project imports:
 import 'package:passputter/src/oauth_token.dart';
+import 'package:test/test.dart';
+import 'package:time/time.dart';
 
 void main() {
   group('fromMap', () {
@@ -24,7 +23,7 @@ void main() {
     });
 
     test('without refresh token parses successfully', () {
-      final clock = Clock.fixed(DateTime(2021, 5, 1));
+      final clock = Clock.fixed(DateTime(2021, 5));
 
       final map = <String, dynamic>{
         'access_token': 'token',
@@ -41,7 +40,7 @@ void main() {
     });
 
     test('with all arguments parses successfully', () {
-      final clock = Clock.fixed(DateTime(2021, 5, 1));
+      final clock = Clock.fixed(DateTime(2021, 5));
 
       final map = <String, dynamic>{
         'access_token': 'token',
diff --git a/test/src/passputter_impl_test.dart b/test/src/passputter_impl_test.dart
index 650a002..a6420a5 100644
--- a/test/src/passputter_impl_test.dart
+++ b/test/src/passputter_impl_test.dart
@@ -1,12 +1,10 @@
 // 📦 Package imports:
 import 'package:mocktail/mocktail.dart';
-import 'package:test/test.dart';
-
 // 🌎 Project imports:
 import 'package:passputter/passputter.dart';
 import 'package:passputter/src/oauth_api_interface.dart';
-import 'package:passputter/src/oauth_token.dart';
 import 'package:passputter/src/passputter_impl.dart';
+import 'package:test/test.dart';
 
 class MockOAuthApi extends Mock implements OAuthApiInterface {}
 
diff --git a/test/src/token_expired_exception_test.dart b/test/src/token_expired_exception_test.dart
index 360caef..ca08467 100644
--- a/test/src/token_expired_exception_test.dart
+++ b/test/src/token_expired_exception_test.dart
@@ -1,9 +1,8 @@
 // 📦 Package imports:
-import 'package:test/test.dart';
-
 // 🌎 Project imports:
 import 'package:passputter/src/oauth_token.dart';
 import 'package:passputter/src/token_expired_exception.dart';
+import 'package:test/test.dart';
 
 void main() {
   test('equal exceptions are evaluated as equal', () async {
diff --git a/test/src/user_token_interceptor_test.dart b/test/src/user_token_interceptor_test.dart
index 03988ab..9497dba 100644
--- a/test/src/user_token_interceptor_test.dart
+++ b/test/src/user_token_interceptor_test.dart
@@ -2,14 +2,12 @@
 import 'package:clock/clock.dart';
 import 'package:dio/dio.dart';
 import 'package:mocktail/mocktail.dart';
-import 'package:test/test.dart';
-import 'package:time/time.dart';
-
 // 🌎 Project imports:
 import 'package:passputter/passputter.dart';
 import 'package:passputter/src/oauth_api_interface.dart';
-import 'package:passputter/src/oauth_token.dart';
 import 'package:passputter/src/token_expired_exception.dart';
+import 'package:test/test.dart';
+import 'package:time/time.dart';
 
 class MockOAuthApi extends Mock implements OAuthApiInterface {}