diff --git a/lib/src/authorization_code_grant.dart b/lib/src/authorization_code_grant.dart
index b4c50d9..dcb36d0 100644
--- a/lib/src/authorization_code_grant.dart
+++ b/lib/src/authorization_code_grant.dart
@@ -75,7 +75,7 @@
   final Uri tokenEndpoint;
 
   /// The HTTP client used to make HTTP requests.
-  http.BaseClient _httpClient;
+  http.Client _httpClient;
 
   /// The URL to which the resource owner will be redirected after they
   /// authorize this client with the authorization server.
@@ -101,7 +101,7 @@
       this.secret,
       this.authorizationEndpoint,
       this.tokenEndpoint,
-      {http.BaseClient httpClient})
+      {http.Client httpClient})
     : _httpClient = httpClient == null ? new http.Client() : httpClient;
 
   /// Returns the URL to which the resource owner should be redirected to
diff --git a/lib/src/client.dart b/lib/src/client.dart
index dc71e40..7322afa 100644
--- a/lib/src/client.dart
+++ b/lib/src/client.dart
@@ -14,9 +14,8 @@
 
 // TODO(nweiz): Add an onCredentialsRefreshed event once we have some event
 // infrastructure.
-/// An OAuth2 client. This acts as a drop-in replacement for an
-/// [http.BaseClient], while sending OAuth2 authorization credentials along with
-/// each request.
+/// An OAuth2 client. This acts as a drop-in replacement for an [http.Client],
+/// while sending OAuth2 authorization credentials along with each request.
 ///
 /// The client also automatically refreshes its credentials if possible. When it
 /// makes a request, if its credentials are expired, it will first refresh them.
@@ -62,7 +61,7 @@
   Credentials _credentials;
 
   /// The underlying HTTP client.
-  http.BaseClient _httpClient;
+  http.Client _httpClient;
 
   /// Creates a new client from a pre-existing set of credentials. When
   /// authorizing a client for the first time, you should use
@@ -74,7 +73,7 @@
       this.identifier,
       this.secret,
       this._credentials,
-      {http.BaseClient httpClient})
+      {http.Client httpClient})
     : _httpClient = httpClient == null ? new http.Client() : httpClient;
 
   /// Sends an HTTP request with OAuth2 authorization credentials attached. This
diff --git a/lib/src/credentials.dart b/lib/src/credentials.dart
index 1a35827..89af777 100644
--- a/lib/src/credentials.dart
+++ b/lib/src/credentials.dart
@@ -145,7 +145,7 @@
       String identifier,
       String secret,
       {List<String> newScopes,
-       http.BaseClient httpClient}) {
+       http.Client httpClient}) {
     var scopes = this.scopes;
     if (newScopes != null) scopes = newScopes;
     if (scopes == null) scopes = <String>[];