diff --git a/packages/firebase_analytics/firebase_analytics/ios/firebase_analytics/Sources/firebase_analytics/FirebaseAnalyticsPlugin.swift b/packages/firebase_analytics/firebase_analytics/ios/firebase_analytics/Sources/firebase_analytics/FirebaseAnalyticsPlugin.swift
index fcd6bda21819..c84ba817ae47 100644
--- a/packages/firebase_analytics/firebase_analytics/ios/firebase_analytics/Sources/firebase_analytics/FirebaseAnalyticsPlugin.swift
+++ b/packages/firebase_analytics/firebase_analytics/ios/firebase_analytics/Sources/firebase_analytics/FirebaseAnalyticsPlugin.swift
@@ -122,7 +122,7 @@ public class FirebaseAnalyticsPlugin: NSObject, FLTFirebasePluginProtocol, Flutt
     }
   }
 
-  func initiateOnDeviceConversionMeasurement(arguments: [String: String?],
+  func initiateOnDeviceConversionMeasurement(arguments: [String: Any?],
                                              completion: @escaping (Result<Void, any Error>)
                                                -> Void) {
     if let emailAddress = arguments["emailAddress"] as? String {
@@ -131,13 +131,11 @@ public class FirebaseAnalyticsPlugin: NSObject, FLTFirebasePluginProtocol, Flutt
     if let phoneNumber = arguments["phoneNumber"] as? String {
       Analytics.initiateOnDeviceConversionMeasurement(phoneNumber: phoneNumber)
     }
-    if let hashedEmailAddress = arguments["hashedEmailAddress"] as? String,
-       let data = hashedEmailAddress.data(using: .utf8) {
-      Analytics.initiateOnDeviceConversionMeasurement(hashedEmailAddress: data)
+    if let hashedEmailAddress = arguments["hashedEmailAddress"] as? FlutterStandardTypedData {
+        Analytics.initiateOnDeviceConversionMeasurement(hashedEmailAddress: hashedEmailAddress.data)
     }
-    if let hashedPhoneNumber = arguments["hashedPhoneNumber"] as? String,
-       let data = hashedPhoneNumber.data(using: .utf8) {
-      Analytics.initiateOnDeviceConversionMeasurement(hashedPhoneNumber: data)
+    if let hashedPhoneNumber = arguments["hashedPhoneNumber"] as? FlutterStandardTypedData {
+        Analytics.initiateOnDeviceConversionMeasurement(hashedPhoneNumber: hashedPhoneNumber.data)
     }
     completion(.success(()))
   }
@@ -161,4 +159,4 @@ public class FirebaseAnalyticsPlugin: NSObject, FLTFirebasePluginProtocol, Flutt
   public func flutterChannelName() -> String {
     FLTFirebaseAnalyticsChannelName
   }
-}
+}
\ No newline at end of file
diff --git a/packages/firebase_analytics/firebase_analytics/lib/src/firebase_analytics.dart b/packages/firebase_analytics/firebase_analytics/lib/src/firebase_analytics.dart
index 0676996ca2ad..cfa2ab1e934e 100755
--- a/packages/firebase_analytics/firebase_analytics/lib/src/firebase_analytics.dart
+++ b/packages/firebase_analytics/firebase_analytics/lib/src/firebase_analytics.dart
@@ -1251,7 +1251,7 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
   ///
   /// Only available on iOS.
   Future<void> initiateOnDeviceConversionMeasurementWithHashedEmailAddress(
-    String hashedEmailAddress,
+    Uint8List hashedEmailAddress,
   ) async {
     if (defaultTargetPlatform != TargetPlatform.iOS) {
       throw UnimplementedError(
@@ -1268,7 +1268,7 @@ class FirebaseAnalytics extends FirebasePluginPlatform {
   ///
   /// Only available on iOS.
   Future<void> initiateOnDeviceConversionMeasurementWithHashedPhoneNumber(
-    String hashedPhoneNumber,
+    Uint8List hashedPhoneNumber,
   ) async {
     if (defaultTargetPlatform != TargetPlatform.iOS) {
       throw UnimplementedError(
diff --git a/packages/firebase_analytics/firebase_analytics_platform_interface/lib/src/method_channel/method_channel_firebase_analytics.dart b/packages/firebase_analytics/firebase_analytics_platform_interface/lib/src/method_channel/method_channel_firebase_analytics.dart
index 0ad8119fe21c..5b9d552c640d 100644
--- a/packages/firebase_analytics/firebase_analytics_platform_interface/lib/src/method_channel/method_channel_firebase_analytics.dart
+++ b/packages/firebase_analytics/firebase_analytics_platform_interface/lib/src/method_channel/method_channel_firebase_analytics.dart
@@ -179,12 +179,12 @@ class MethodChannelFirebaseAnalytics extends FirebaseAnalyticsPlatform {
   Future<void> initiateOnDeviceConversionMeasurement({
     String? emailAddress,
     String? phoneNumber,
-    String? hashedEmailAddress,
-    String? hashedPhoneNumber,
+    Uint8List? hashedEmailAddress,
+    Uint8List? hashedPhoneNumber,
   }) {
     try {
       return _api.initiateOnDeviceConversionMeasurement(
-        <String, String?>{
+        <String, Object?>{
           'emailAddress': emailAddress,
           'phoneNumber': phoneNumber,
           'hashedEmailAddress': hashedEmailAddress,
diff --git a/packages/firebase_analytics/firebase_analytics_platform_interface/lib/src/pigeon/messages.pigeon.dart b/packages/firebase_analytics/firebase_analytics_platform_interface/lib/src/pigeon/messages.pigeon.dart
index 6b74cc466a3d..5b5013cbae0a 100644
--- a/packages/firebase_analytics/firebase_analytics_platform_interface/lib/src/pigeon/messages.pigeon.dart
+++ b/packages/firebase_analytics/firebase_analytics_platform_interface/lib/src/pigeon/messages.pigeon.dart
@@ -18,8 +18,7 @@ PlatformException _createConnectionError(String channelName) {
   );
 }
 
-List<Object?> wrapResponse(
-    {Object? result, PlatformException? error, bool empty = false}) {
+List<Object?> wrapResponse({Object? result, PlatformException? error, bool empty = false}) {
   if (empty) {
     return <Object?>[];
   }
@@ -28,22 +27,21 @@ List<Object?> wrapResponse(
   }
   return <Object?>[error.code, error.message, error.details];
 }
-
 bool _deepEquals(Object? a, Object? b) {
   if (a is List && b is List) {
     return a.length == b.length &&
         a.indexed
-            .every(((int, dynamic) item) => _deepEquals(item.$2, b[item.$1]));
+        .every(((int, dynamic) item) => _deepEquals(item.$2, b[item.$1]));
   }
   if (a is Map && b is Map) {
-    return a.length == b.length &&
-        a.entries.every((MapEntry<Object?, Object?> entry) =>
-            (b as Map<Object?, Object?>).containsKey(entry.key) &&
-            _deepEquals(entry.value, b[entry.key]));
+    return a.length == b.length && a.entries.every((MapEntry<Object?, Object?> entry) =>
+        (b as Map<Object?, Object?>).containsKey(entry.key) &&
+        _deepEquals(entry.value, b[entry.key]));
   }
   return a == b;
 }
 
+
 class AnalyticsEvent {
   AnalyticsEvent({
     required this.name,
@@ -62,15 +60,13 @@ class AnalyticsEvent {
   }
 
   Object encode() {
-    return _toList();
-  }
+    return _toList();  }
 
   static AnalyticsEvent decode(Object result) {
     result as List<Object?>;
     return AnalyticsEvent(
       name: result[0]! as String,
-      parameters:
-          (result[1] as Map<Object?, Object?>?)?.cast<String?, Object?>(),
+      parameters: (result[1] as Map<Object?, Object?>?)?.cast<String?, Object?>(),
     );
   }
 
@@ -88,9 +84,11 @@ class AnalyticsEvent {
 
   @override
   // ignore: avoid_equals_and_hash_code_on_mutable_classes
-  int get hashCode => Object.hashAll(_toList());
+  int get hashCode => Object.hashAll(_toList())
+;
 }
 
+
 class _PigeonCodec extends StandardMessageCodec {
   const _PigeonCodec();
   @override
@@ -98,7 +96,7 @@ class _PigeonCodec extends StandardMessageCodec {
     if (value is int) {
       buffer.putUint8(4);
       buffer.putInt64(value);
-    } else if (value is AnalyticsEvent) {
+    }    else if (value is AnalyticsEvent) {
       buffer.putUint8(129);
       writeValue(buffer, value.encode());
     } else {
@@ -109,7 +107,7 @@ class _PigeonCodec extends StandardMessageCodec {
   @override
   Object? readValueOfType(int type, ReadBuffer buffer) {
     switch (type) {
-      case 129:
+      case 129: 
         return AnalyticsEvent.decode(readValue(buffer)!);
       default:
         return super.readValueOfType(type, buffer);
@@ -121,11 +119,9 @@ class FirebaseAnalyticsHostApi {
   /// Constructor for [FirebaseAnalyticsHostApi].  The [binaryMessenger] named argument is
   /// available for dependency injection.  If it is left null, the default
   /// BinaryMessenger will be used which routes to the host platform.
-  FirebaseAnalyticsHostApi(
-      {BinaryMessenger? binaryMessenger, String messageChannelSuffix = ''})
+  FirebaseAnalyticsHostApi({BinaryMessenger? binaryMessenger, String messageChannelSuffix = ''})
       : pigeonVar_binaryMessenger = binaryMessenger,
-        pigeonVar_messageChannelSuffix =
-            messageChannelSuffix.isNotEmpty ? '.$messageChannelSuffix' : '';
+        pigeonVar_messageChannelSuffix = messageChannelSuffix.isNotEmpty ? '.$messageChannelSuffix' : '';
   final BinaryMessenger? pigeonVar_binaryMessenger;
 
   static const MessageCodec<Object?> pigeonChannelCodec = _PigeonCodec();
@@ -133,16 +129,13 @@ class FirebaseAnalyticsHostApi {
   final String pigeonVar_messageChannelSuffix;
 
   Future<void> logEvent(Map<String, Object?> event) async {
-    final String pigeonVar_channelName =
-        'dev.flutter.pigeon.firebase_analytics_platform_interface.FirebaseAnalyticsHostApi.logEvent$pigeonVar_messageChannelSuffix';
-    final BasicMessageChannel<Object?> pigeonVar_channel =
-        BasicMessageChannel<Object?>(
+    final String pigeonVar_channelName = 'dev.flutter.pigeon.firebase_analytics_platform_interface.FirebaseAnalyticsHostApi.logEvent$pigeonVar_messageChannelSuffix';
+    final BasicMessageChannel<Object?> pigeonVar_channel = BasicMessageChannel<Object?>(
       pigeonVar_channelName,
       pigeonChannelCodec,
       binaryMessenger: pigeonVar_binaryMessenger,
     );
-    final Future<Object?> pigeonVar_sendFuture =
-        pigeonVar_channel.send(<Object?>[event]);
+    final Future<Object?> pigeonVar_sendFuture = pigeonVar_channel.send(<Object?>[event]);
     final List<Object?>? pigeonVar_replyList =
         await pigeonVar_sendFuture as List<Object?>?;
     if (pigeonVar_replyList == null) {
@@ -159,16 +152,13 @@ class FirebaseAnalyticsHostApi {
   }
 
   Future<void> setUserId(String? userId) async {
-    final String pigeonVar_channelName =
-        'dev.flutter.pigeon.firebase_analytics_platform_interface.FirebaseAnalyticsHostApi.setUserId$pigeonVar_messageChannelSuffix';
-    final BasicMessageChannel<Object?> pigeonVar_channel =
-        BasicMessageChannel<Object?>(
+    final String pigeonVar_channelName = 'dev.flutter.pigeon.firebase_analytics_platform_interface.FirebaseAnalyticsHostApi.setUserId$pigeonVar_messageChannelSuffix';
+    final BasicMessageChannel<Object?> pigeonVar_channel = BasicMessageChannel<Object?>(
       pigeonVar_channelName,
       pigeonChannelCodec,
       binaryMessenger: pigeonVar_binaryMessenger,
     );
-    final Future<Object?> pigeonVar_sendFuture =
-        pigeonVar_channel.send(<Object?>[userId]);
+    final Future<Object?> pigeonVar_sendFuture = pigeonVar_channel.send(<Object?>[userId]);
     final List<Object?>? pigeonVar_replyList =
         await pigeonVar_sendFuture as List<Object?>?;
     if (pigeonVar_replyList == null) {
@@ -185,16 +175,13 @@ class FirebaseAnalyticsHostApi {
   }
 
   Future<void> setUserProperty(String name, String? value) async {
-    final String pigeonVar_channelName =
-        'dev.flutter.pigeon.firebase_analytics_platform_interface.FirebaseAnalyticsHostApi.setUserProperty$pigeonVar_messageChannelSuffix';
-    final BasicMessageChannel<Object?> pigeonVar_channel =
-        BasicMessageChannel<Object?>(
+    final String pigeonVar_channelName = 'dev.flutter.pigeon.firebase_analytics_platform_interface.FirebaseAnalyticsHostApi.setUserProperty$pigeonVar_messageChannelSuffix';
+    final BasicMessageChannel<Object?> pigeonVar_channel = BasicMessageChannel<Object?>(
       pigeonVar_channelName,
       pigeonChannelCodec,
       binaryMessenger: pigeonVar_binaryMessenger,
     );
-    final Future<Object?> pigeonVar_sendFuture =
-        pigeonVar_channel.send(<Object?>[name, value]);
+    final Future<Object?> pigeonVar_sendFuture = pigeonVar_channel.send(<Object?>[name, value]);
     final List<Object?>? pigeonVar_replyList =
         await pigeonVar_sendFuture as List<Object?>?;
     if (pigeonVar_replyList == null) {
@@ -211,16 +198,13 @@ class FirebaseAnalyticsHostApi {
   }
 
   Future<void> setAnalyticsCollectionEnabled(bool enabled) async {
-    final String pigeonVar_channelName =
-        'dev.flutter.pigeon.firebase_analytics_platform_interface.FirebaseAnalyticsHostApi.setAnalyticsCollectionEnabled$pigeonVar_messageChannelSuffix';
-    final BasicMessageChannel<Object?> pigeonVar_channel =
-        BasicMessageChannel<Object?>(
+    final String pigeonVar_channelName = 'dev.flutter.pigeon.firebase_analytics_platform_interface.FirebaseAnalyticsHostApi.setAnalyticsCollectionEnabled$pigeonVar_messageChannelSuffix';
+    final BasicMessageChannel<Object?> pigeonVar_channel = BasicMessageChannel<Object?>(
       pigeonVar_channelName,
       pigeonChannelCodec,
       binaryMessenger: pigeonVar_binaryMessenger,
     );
-    final Future<Object?> pigeonVar_sendFuture =
-        pigeonVar_channel.send(<Object?>[enabled]);
+    final Future<Object?> pigeonVar_sendFuture = pigeonVar_channel.send(<Object?>[enabled]);
     final List<Object?>? pigeonVar_replyList =
         await pigeonVar_sendFuture as List<Object?>?;
     if (pigeonVar_replyList == null) {
@@ -237,10 +221,8 @@ class FirebaseAnalyticsHostApi {
   }
 
   Future<void> resetAnalyticsData() async {
-    final String pigeonVar_channelName =
-        'dev.flutter.pigeon.firebase_analytics_platform_interface.FirebaseAnalyticsHostApi.resetAnalyticsData$pigeonVar_messageChannelSuffix';
-    final BasicMessageChannel<Object?> pigeonVar_channel =
-        BasicMessageChannel<Object?>(
+    final String pigeonVar_channelName = 'dev.flutter.pigeon.firebase_analytics_platform_interface.FirebaseAnalyticsHostApi.resetAnalyticsData$pigeonVar_messageChannelSuffix';
+    final BasicMessageChannel<Object?> pigeonVar_channel = BasicMessageChannel<Object?>(
       pigeonVar_channelName,
       pigeonChannelCodec,
       binaryMessenger: pigeonVar_binaryMessenger,
@@ -262,16 +244,13 @@ class FirebaseAnalyticsHostApi {
   }
 
   Future<void> setSessionTimeoutDuration(int timeout) async {
-    final String pigeonVar_channelName =
-        'dev.flutter.pigeon.firebase_analytics_platform_interface.FirebaseAnalyticsHostApi.setSessionTimeoutDuration$pigeonVar_messageChannelSuffix';
-    final BasicMessageChannel<Object?> pigeonVar_channel =
-        BasicMessageChannel<Object?>(
+    final String pigeonVar_channelName = 'dev.flutter.pigeon.firebase_analytics_platform_interface.FirebaseAnalyticsHostApi.setSessionTimeoutDuration$pigeonVar_messageChannelSuffix';
+    final BasicMessageChannel<Object?> pigeonVar_channel = BasicMessageChannel<Object?>(
       pigeonVar_channelName,
       pigeonChannelCodec,
       binaryMessenger: pigeonVar_binaryMessenger,
     );
-    final Future<Object?> pigeonVar_sendFuture =
-        pigeonVar_channel.send(<Object?>[timeout]);
+    final Future<Object?> pigeonVar_sendFuture = pigeonVar_channel.send(<Object?>[timeout]);
     final List<Object?>? pigeonVar_replyList =
         await pigeonVar_sendFuture as List<Object?>?;
     if (pigeonVar_replyList == null) {
@@ -288,16 +267,13 @@ class FirebaseAnalyticsHostApi {
   }
 
   Future<void> setConsent(Map<String, bool?> consent) async {
-    final String pigeonVar_channelName =
-        'dev.flutter.pigeon.firebase_analytics_platform_interface.FirebaseAnalyticsHostApi.setConsent$pigeonVar_messageChannelSuffix';
-    final BasicMessageChannel<Object?> pigeonVar_channel =
-        BasicMessageChannel<Object?>(
+    final String pigeonVar_channelName = 'dev.flutter.pigeon.firebase_analytics_platform_interface.FirebaseAnalyticsHostApi.setConsent$pigeonVar_messageChannelSuffix';
+    final BasicMessageChannel<Object?> pigeonVar_channel = BasicMessageChannel<Object?>(
       pigeonVar_channelName,
       pigeonChannelCodec,
       binaryMessenger: pigeonVar_binaryMessenger,
     );
-    final Future<Object?> pigeonVar_sendFuture =
-        pigeonVar_channel.send(<Object?>[consent]);
+    final Future<Object?> pigeonVar_sendFuture = pigeonVar_channel.send(<Object?>[consent]);
     final List<Object?>? pigeonVar_replyList =
         await pigeonVar_sendFuture as List<Object?>?;
     if (pigeonVar_replyList == null) {
@@ -313,18 +289,14 @@ class FirebaseAnalyticsHostApi {
     }
   }
 
-  Future<void> setDefaultEventParameters(
-      Map<String, Object?>? parameters) async {
-    final String pigeonVar_channelName =
-        'dev.flutter.pigeon.firebase_analytics_platform_interface.FirebaseAnalyticsHostApi.setDefaultEventParameters$pigeonVar_messageChannelSuffix';
-    final BasicMessageChannel<Object?> pigeonVar_channel =
-        BasicMessageChannel<Object?>(
+  Future<void> setDefaultEventParameters(Map<String, Object?>? parameters) async {
+    final String pigeonVar_channelName = 'dev.flutter.pigeon.firebase_analytics_platform_interface.FirebaseAnalyticsHostApi.setDefaultEventParameters$pigeonVar_messageChannelSuffix';
+    final BasicMessageChannel<Object?> pigeonVar_channel = BasicMessageChannel<Object?>(
       pigeonVar_channelName,
       pigeonChannelCodec,
       binaryMessenger: pigeonVar_binaryMessenger,
     );
-    final Future<Object?> pigeonVar_sendFuture =
-        pigeonVar_channel.send(<Object?>[parameters]);
+    final Future<Object?> pigeonVar_sendFuture = pigeonVar_channel.send(<Object?>[parameters]);
     final List<Object?>? pigeonVar_replyList =
         await pigeonVar_sendFuture as List<Object?>?;
     if (pigeonVar_replyList == null) {
@@ -341,10 +313,8 @@ class FirebaseAnalyticsHostApi {
   }
 
   Future<String?> getAppInstanceId() async {
-    final String pigeonVar_channelName =
-        'dev.flutter.pigeon.firebase_analytics_platform_interface.FirebaseAnalyticsHostApi.getAppInstanceId$pigeonVar_messageChannelSuffix';
-    final BasicMessageChannel<Object?> pigeonVar_channel =
-        BasicMessageChannel<Object?>(
+    final String pigeonVar_channelName = 'dev.flutter.pigeon.firebase_analytics_platform_interface.FirebaseAnalyticsHostApi.getAppInstanceId$pigeonVar_messageChannelSuffix';
+    final BasicMessageChannel<Object?> pigeonVar_channel = BasicMessageChannel<Object?>(
       pigeonVar_channelName,
       pigeonChannelCodec,
       binaryMessenger: pigeonVar_binaryMessenger,
@@ -366,10 +336,8 @@ class FirebaseAnalyticsHostApi {
   }
 
   Future<int?> getSessionId() async {
-    final String pigeonVar_channelName =
-        'dev.flutter.pigeon.firebase_analytics_platform_interface.FirebaseAnalyticsHostApi.getSessionId$pigeonVar_messageChannelSuffix';
-    final BasicMessageChannel<Object?> pigeonVar_channel =
-        BasicMessageChannel<Object?>(
+    final String pigeonVar_channelName = 'dev.flutter.pigeon.firebase_analytics_platform_interface.FirebaseAnalyticsHostApi.getSessionId$pigeonVar_messageChannelSuffix';
+    final BasicMessageChannel<Object?> pigeonVar_channel = BasicMessageChannel<Object?>(
       pigeonVar_channelName,
       pigeonChannelCodec,
       binaryMessenger: pigeonVar_binaryMessenger,
@@ -390,18 +358,14 @@ class FirebaseAnalyticsHostApi {
     }
   }
 
-  Future<void> initiateOnDeviceConversionMeasurement(
-      Map<String, String?> arguments) async {
-    final String pigeonVar_channelName =
-        'dev.flutter.pigeon.firebase_analytics_platform_interface.FirebaseAnalyticsHostApi.initiateOnDeviceConversionMeasurement$pigeonVar_messageChannelSuffix';
-    final BasicMessageChannel<Object?> pigeonVar_channel =
-        BasicMessageChannel<Object?>(
+  Future<void> initiateOnDeviceConversionMeasurement(Map<String, Object?> arguments) async {
+    final String pigeonVar_channelName = 'dev.flutter.pigeon.firebase_analytics_platform_interface.FirebaseAnalyticsHostApi.initiateOnDeviceConversionMeasurement$pigeonVar_messageChannelSuffix';
+    final BasicMessageChannel<Object?> pigeonVar_channel = BasicMessageChannel<Object?>(
       pigeonVar_channelName,
       pigeonChannelCodec,
       binaryMessenger: pigeonVar_binaryMessenger,
     );
-    final Future<Object?> pigeonVar_sendFuture =
-        pigeonVar_channel.send(<Object?>[arguments]);
+    final Future<Object?> pigeonVar_sendFuture = pigeonVar_channel.send(<Object?>[arguments]);
     final List<Object?>? pigeonVar_replyList =
         await pigeonVar_sendFuture as List<Object?>?;
     if (pigeonVar_replyList == null) {
diff --git a/packages/firebase_analytics/firebase_analytics_platform_interface/lib/src/platform_interface/platform_interface_firebase_analytics.dart b/packages/firebase_analytics/firebase_analytics_platform_interface/lib/src/platform_interface/platform_interface_firebase_analytics.dart
index 8fbe90066d5b..0f3d8332f4c0 100644
--- a/packages/firebase_analytics/firebase_analytics_platform_interface/lib/src/platform_interface/platform_interface_firebase_analytics.dart
+++ b/packages/firebase_analytics/firebase_analytics_platform_interface/lib/src/platform_interface/platform_interface_firebase_analytics.dart
@@ -3,6 +3,7 @@
 // found in the LICENSE file.
 
 import 'dart:async';
+import 'dart:typed_data';
 
 import 'package:firebase_core/firebase_core.dart';
 import 'package:meta/meta.dart' show protected;
@@ -202,8 +203,8 @@ abstract class FirebaseAnalyticsPlatform extends PlatformInterface {
   Future<void> initiateOnDeviceConversionMeasurement({
     String? emailAddress,
     String? phoneNumber,
-    String? hashedEmailAddress,
-    String? hashedPhoneNumber,
+    Uint8List? hashedEmailAddress,
+    Uint8List? hashedPhoneNumber,
   }) {
     throw UnimplementedError(
       'initiateOnDeviceConversionMeasurement() is not implemented',
diff --git a/packages/firebase_analytics/firebase_analytics_platform_interface/pigeons/messages.dart b/packages/firebase_analytics/firebase_analytics_platform_interface/pigeons/messages.dart
index 4c1ada746e85..b0fef7bda46d 100644
--- a/packages/firebase_analytics/firebase_analytics_platform_interface/pigeons/messages.dart
+++ b/packages/firebase_analytics/firebase_analytics_platform_interface/pigeons/messages.dart
@@ -65,5 +65,5 @@ abstract class FirebaseAnalyticsHostApi {
   int? getSessionId();
 
   @async
-  void initiateOnDeviceConversionMeasurement(Map<String, String?> arguments);
+  void initiateOnDeviceConversionMeasurement(Map<String, Object?> arguments);
 }