diff --git a/lib/src/oauth_chopper.dart b/lib/src/oauth_chopper.dart
index 0d35e0b..6367ac3 100644
--- a/lib/src/oauth_chopper.dart
+++ b/lib/src/oauth_chopper.dart
@@ -1,6 +1,7 @@
 import 'dart:async';
 
-import 'package:oauth2/oauth2.dart';
+import 'package:http/http.dart' as http;
+import 'package:oauth2/oauth2.dart' as oauth2;
 import 'package:oauth_chopper/src/oauth_authenticator.dart';
 import 'package:oauth_chopper/src/oauth_grant.dart';
 import 'package:oauth_chopper/src/oauth_interceptor.dart';
@@ -27,6 +28,7 @@ class OAuthChopper {
     required this.identifier,
     required this.secret,
     this.endSessionEndpoint,
+    this.httpClient,
 
     /// OAuth storage for storing credentials.
     /// By default it will use a in memory storage [MemoryStorage].
@@ -53,6 +55,10 @@ class OAuthChopper {
   /// See [OAuthStorage] for more information.
   final OAuthStorage _storage;
 
+  /// Provide a custom [http.Client] which will be passed to [oauth2] and used
+  /// for making new requests.
+  final http.Client? httpClient;
+
   /// Get stored [OAuthToken].
   Future<OAuthToken?> get token async {
     final credentialsJson = await _storage.fetchCredentials();
@@ -76,18 +82,21 @@ class OAuthChopper {
   /// Tries to refresh the available credentials and returns a new [OAuthToken]
   /// instance.
   /// Throws an exception when refreshing fails. If the exception is a
-  /// [AuthorizationException] it clears the storage.
-  /// See [Credentials.refresh]
+  /// [oauth2.AuthorizationException] it clears the storage.
+  /// See [oauth2.Credentials.refresh]
   Future<OAuthToken?> refresh() async {
     final credentialsJson = await _storage.fetchCredentials();
     if (credentialsJson == null) return null;
-    final credentials = Credentials.fromJson(credentialsJson);
+    final credentials = oauth2.Credentials.fromJson(credentialsJson);
     try {
-      final newCredentials =
-          await credentials.refresh(identifier: identifier, secret: secret);
+      final newCredentials = await credentials.refresh(
+        identifier: identifier,
+        secret: secret,
+        httpClient: httpClient,
+      );
       await _storage.saveCredentials(newCredentials.toJson());
       return OAuthToken.fromCredentials(newCredentials);
-    } on AuthorizationException {
+    } on oauth2.AuthorizationException {
       _storage.clear();
       rethrow;
     }
@@ -99,11 +108,15 @@ class OAuthChopper {
   /// Currently supported grants:
   ///  - [ResourceOwnerPasswordGrant]
   ///  - [ClientCredentialsGrant]
-  ///
+  ///  - [AuthorizationCodeGrant]
   /// Throws an exception if the grant fails.
   Future<OAuthToken> requestGrant(OAuthGrant grant) async {
-    final credentials =
-        await grant.handle(authorizationEndpoint, identifier, secret);
+    final credentials = await grant.handle(
+      authorizationEndpoint,
+      identifier,
+      secret,
+      httpClient,
+    );
 
     await _storage.saveCredentials(credentials);
 
diff --git a/lib/src/oauth_grant.dart b/lib/src/oauth_grant.dart
index 3faa6ea..6392951 100644
--- a/lib/src/oauth_grant.dart
+++ b/lib/src/oauth_grant.dart
@@ -1,3 +1,4 @@
+import 'package:http/http.dart' as http;
 import 'package:oauth2/oauth2.dart' as oauth;
 
 /// {@template oauth_grant}
@@ -13,6 +14,7 @@ abstract interface class OAuthGrant {
     Uri authorizationEndpoint,
     String identifier,
     String secret,
+    http.Client? httpClient,
   );
 }
 
@@ -40,6 +42,7 @@ class ResourceOwnerPasswordGrant implements OAuthGrant {
     Uri authorizationEndpoint,
     String identifier,
     String secret,
+    http.Client? httpClient,
   ) async {
     final client = await oauth.resourceOwnerPasswordGrant(
       authorizationEndpoint,
@@ -47,6 +50,7 @@ class ResourceOwnerPasswordGrant implements OAuthGrant {
       password,
       secret: secret,
       identifier: identifier,
+      httpClient: httpClient,
     );
     return client.credentials.toJson();
   }
@@ -64,11 +68,13 @@ class ClientCredentialsGrant implements OAuthGrant {
     Uri authorizationEndpoint,
     String identifier,
     String secret,
+    http.Client? httpClient,
   ) async {
     final client = await oauth.clientCredentialsGrant(
       authorizationEndpoint,
       identifier,
       secret,
+      httpClient: httpClient,
     );
     return client.credentials.toJson();
   }
@@ -113,11 +119,13 @@ class AuthorizationCodeGrant implements OAuthGrant {
     Uri authorizationEndpoint,
     String identifier,
     String secret,
+    http.Client? httpClient,
   ) async {
     final grant = oauth.AuthorizationCodeGrant(
       identifier,
       authorizationEndpoint,
       tokenEndpoint,
+      httpClient: httpClient,
     );
 
     final authorizationUrl = grant.getAuthorizationUrl(
diff --git a/pubspec.yaml b/pubspec.yaml
index f5aa0d4..9b8db55 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -8,10 +8,10 @@ environment:
 
 dependencies:
   chopper: ^7.2.0
+  http: ^1.2.1
   oauth2: ^2.0.2
 
 dev_dependencies:
-  http: ^1.2.1
   mocktail: ^1.0.3
   test: ^1.25.2
   very_good_analysis: ^5.1.0
diff --git a/test/oauth_chopper_test.dart b/test/oauth_chopper_test.dart
index c529568..ce728b9 100644
--- a/test/oauth_chopper_test.dart
+++ b/test/oauth_chopper_test.dart
@@ -93,7 +93,7 @@ void main() {
   test('Successful grant is stored', () async {
     // arrange
     when(() => storageMock.saveCredentials(any())).thenAnswer((_) => null);
-    when(() => grantMock.handle(any(), any(), any()))
+    when(() => grantMock.handle(any(), any(), any(), null))
         .thenAnswer((_) async => testJson);
     final oauthChopper = OAuthChopper(
       authorizationEndpoint: Uri.parse('endpoint'),
@@ -106,7 +106,8 @@ void main() {
     final token = await oauthChopper.requestGrant(grantMock);
 
     // assert
-    verify(() => grantMock.handle(any(), 'identifier', 'secret')).called(1);
+    verify(() => grantMock.handle(any(), 'identifier', 'secret', null))
+        .called(1);
     verify(() => storageMock.saveCredentials(testJson)).called(1);
     expect(token.accessToken, 'accesToken');
     expect(token.idToken, 'idToken');