diff --git a/GoogleSignIn.podspec b/GoogleSignIn.podspec
index c6d7c612..91c0350e 100644
--- a/GoogleSignIn.podspec
+++ b/GoogleSignIn.podspec
@@ -35,7 +35,6 @@ The Google Sign-In SDK allows users to sign in with their Google account from th
   s.osx.framework = 'AppKit'
   s.dependency 'AppAuth', '>= 1.7.3', '< 2.0'
   s.dependency 'GTMAppAuth', '>= 4.1.1', '< 5.0'
-  s.dependency 'GTMSessionFetcher/Core', '~> 3.3'
   s.resource_bundle = {
     'GoogleSignIn' => ['GoogleSignIn/Sources/{Resources,Strings}/*']
   }
diff --git a/GoogleSignIn/Sources/GIDSignIn.m b/GoogleSignIn/Sources/GIDSignIn.m
index 4b942ed9..0860ddb6 100644
--- a/GoogleSignIn/Sources/GIDSignIn.m
+++ b/GoogleSignIn/Sources/GIDSignIn.m
@@ -252,15 +252,21 @@ - (void)signInWithPresentingViewController:(UIViewController *)presentingViewCon
 - (void)signInWithPresentingViewController:(UIViewController *)presentingViewController
                                       hint:(nullable NSString *)hint
                           additionalScopes:(nullable NSArray<NSString *> *)additionalScopes
+                          additionalParams:(nullable NSDictionary *)extraParams
                                 completion:(nullable GIDSignInCompletion)completion {
-  GIDSignInInternalOptions *options =
+    GIDSignInInternalOptions *options =
     [GIDSignInInternalOptions defaultOptionsWithConfiguration:_configuration
                                      presentingViewController:presentingViewController
                                                     loginHint:hint
                                                 addScopesFlow:NO
                                                        scopes:additionalScopes
                                                    completion:completion];
-  [self signInWithOptions:options];
+    
+    if (extraParams != nil) {
+        options = [options optionsWithExtraParameters:extraParams forContinuation:NO];
+    }
+    
+    [self signInWithOptions:options];
 }
 
 - (void)signInWithPresentingViewController:(UIViewController *)presentingViewController
diff --git a/GoogleSignIn/Sources/Public/GoogleSignIn/GIDSignIn.h b/GoogleSignIn/Sources/Public/GoogleSignIn/GIDSignIn.h
index 2576b13d..3e34da2d 100644
--- a/GoogleSignIn/Sources/Public/GoogleSignIn/GIDSignIn.h
+++ b/GoogleSignIn/Sources/Public/GoogleSignIn/GIDSignIn.h
@@ -162,6 +162,7 @@ typedef NS_ERROR_ENUM(kGIDSignInErrorDomain, GIDSignInErrorCode) {
 - (void)signInWithPresentingViewController:(UIViewController *)presentingViewController
                                       hint:(nullable NSString *)hint
                           additionalScopes:(nullable NSArray<NSString *> *)additionalScopes
+                          additionalParams:(nullable NSDictionary *)extraParams
                                 completion:
     (nullable void (^)(GIDSignInResult *_Nullable signInResult,
                        NSError *_Nullable error))completion