diff --git a/packages/firebase_dynamic_links/firebase_dynamic_links_platform_interface/lib/src/method_channel/method_channel_firebase_dynamic_links.dart b/packages/firebase_dynamic_links/firebase_dynamic_links_platform_interface/lib/src/method_channel/method_channel_firebase_dynamic_links.dart
index a6761d1d0ec4..ca8847176460 100644
--- a/packages/firebase_dynamic_links/firebase_dynamic_links_platform_interface/lib/src/method_channel/method_channel_firebase_dynamic_links.dart
+++ b/packages/firebase_dynamic_links/firebase_dynamic_links_platform_interface/lib/src/method_channel/method_channel_firebase_dynamic_links.dart
@@ -4,8 +4,8 @@
 
 import 'dart:async';
 
-import 'package:firebase_dynamic_links_platform_interface/firebase_dynamic_links_platform_interface.dart';
 import 'package:firebase_core/firebase_core.dart';
+import 'package:firebase_dynamic_links_platform_interface/firebase_dynamic_links_platform_interface.dart';
 import 'package:firebase_dynamic_links_platform_interface/src/method_channel/utils/convert_match_type.dart';
 import 'package:flutter/services.dart';
 
@@ -111,7 +111,7 @@ class MethodChannelFirebaseDynamicLinks extends FirebaseDynamicLinksPlatform {
       ios: iosData,
       utmParameters: linkData['utmParameters'] == null
           ? {}
-          : Map<String, String>.from(linkData['utmParameters']),
+          : Map<String, String?>.from(linkData['utmParameters']),
     );
   }
 
diff --git a/packages/firebase_dynamic_links/firebase_dynamic_links_platform_interface/lib/src/pending_dynamic_link_data.dart b/packages/firebase_dynamic_links/firebase_dynamic_links_platform_interface/lib/src/pending_dynamic_link_data.dart
index e9efc51b6cd2..a545ff6ea031 100644
--- a/packages/firebase_dynamic_links/firebase_dynamic_links_platform_interface/lib/src/pending_dynamic_link_data.dart
+++ b/packages/firebase_dynamic_links/firebase_dynamic_links_platform_interface/lib/src/pending_dynamic_link_data.dart
@@ -30,7 +30,7 @@ class PendingDynamicLinkData {
   final Uri link;
 
   /// UTM parameters associated with a dynamic link.
-  final Map<String, String> utmParameters;
+  final Map<String, String?> utmParameters;
 
   /// Returns the current instance as a [Map].
   Map<String, dynamic> asMap() => <String, dynamic>{