diff --git a/packages/google_sign_in/google_sign_in/CHANGELOG.md b/packages/google_sign_in/google_sign_in/CHANGELOG.md
index 7f4bfddfa45a..3024af0fa756 100644
--- a/packages/google_sign_in/google_sign_in/CHANGELOG.md
+++ b/packages/google_sign_in/google_sign_in/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 4.5.7
+
+* Fix the getToken method used in serverAuthCode on iOS.
+
 ## 4.5.6
 
 * Fix deprecated member warning in tests.
diff --git a/packages/google_sign_in/google_sign_in/ios/Classes/FLTGoogleSignInPlugin.m b/packages/google_sign_in/google_sign_in/ios/Classes/FLTGoogleSignInPlugin.m
index f621d1e68312..f42ea575d392 100644
--- a/packages/google_sign_in/google_sign_in/ios/Classes/FLTGoogleSignInPlugin.m
+++ b/packages/google_sign_in/google_sign_in/ios/Classes/FLTGoogleSignInPlugin.m
@@ -112,6 +112,7 @@ - (void)handleMethodCall:(FlutterMethodCall *)call result:(FlutterResult)result
       result(error != nil ? getFlutterError(error) : @{
         @"idToken" : authentication.idToken,
         @"accessToken" : authentication.accessToken,
+        @"serverAuthCode" : currentUser.serverAuthCode,
       });
     }];
   } else if ([call.method isEqualToString:@"signOut"]) {
@@ -223,8 +224,7 @@ - (void)signIn:(GIDSignIn *)signIn
         @"displayName" : user.profile.name ?: [NSNull null],
         @"email" : user.profile.email ?: [NSNull null],
         @"id" : user.userID ?: [NSNull null],
-        @"photoUrl" : [photoUrl absoluteString] ?: [NSNull null],
-        @"serverAuthCode" : user.serverAuthCode ?: [NSNull null]
+        @"photoUrl" : [photoUrl absoluteString] ?: [NSNull null]
       }
                          error:nil];
     }
diff --git a/packages/google_sign_in/google_sign_in/pubspec.yaml b/packages/google_sign_in/google_sign_in/pubspec.yaml
index a63091b945b2..5bc632fbda06 100644
--- a/packages/google_sign_in/google_sign_in/pubspec.yaml
+++ b/packages/google_sign_in/google_sign_in/pubspec.yaml
@@ -2,7 +2,7 @@ name: google_sign_in
 description: Flutter plugin for Google Sign-In, a secure authentication system
   for signing in with a Google account on Android and iOS.
 homepage: https://github.com/flutter/plugins/tree/master/packages/google_sign_in/google_sign_in
-version: 4.5.6
+version: 4.5.7
 
 flutter:
   plugin: