diff --git a/.jazzy.yaml b/.jazzy.yaml
index ac966807..76020705 100644
--- a/.jazzy.yaml
+++ b/.jazzy.yaml
@@ -8,12 +8,12 @@ theme: apple
 min_acl: public
 sdk: iphoneos
 module: Sora
-module_version: 2022.3.0
+module_version: 2022.4.0
 swift_version: 5.6.1
 xcodebuild_arguments:
     - -parallelizeTargets
     - -sdk
-    - iphoneos15.2
+    - iphoneos15.5
     - -workspace
     - Sora.xcworkspace
     - -scheme
diff --git a/CHANGES.md b/CHANGES.md
index b0f92472..ff157551 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -11,6 +11,24 @@
 
 ## develop
 
+## 2022.4.0
+
+- [UPDATE] システム条件を変更する
+    - macOS 12.3 以降
+    - WebRTC SFU Sora 2022.1 以降
+    - @miosakuma
+- [UPDATE] WebRTC 103.5060.4.0 に上げる
+    - @miosakuma
+- [ADD] Sora の bundle_id に対応する
+    - `Configuration.bundleId` を追加する
+    - @enm10k
+- [CHANGE] mid を必須にする
+    - この修正の結果、 type: offer に mid が含まれない場合は、エラーになります
+    - @enm10k
+- [CHANGE] `Configuration.spotlightEnabled == .enabled` の際に、自動的にサイマルキャストを有効化しない
+    - サイマルキャストを有効化する場合は明示的に `Configuration.simulcastEnabled == true` を設定してください
+    - @enm10k
+
 ## 2022.3.0
 
 - [UPDATE] システム条件を変更する
@@ -20,7 +38,6 @@
 - [UPDATE] WebRTC 102.5005.7.6 に上げる
     - @miosakuma
 - [UPDATE] mid に対応する
-    - @enm10k
 
 ## 2022.2.1
 
diff --git a/Package.swift b/Package.swift
index ac46fa26..7fd67cdc 100644
--- a/Package.swift
+++ b/Package.swift
@@ -3,7 +3,7 @@
 import Foundation
 import PackageDescription
 
-let file = "WebRTC-102.5005.7.6/WebRTC.xcframework.zip"
+let file = "WebRTC-103.5060.4.0/WebRTC.xcframework.zip"
 
 let package = Package(
     name: "Sora",
@@ -16,7 +16,7 @@ let package = Package(
         .binaryTarget(
             name: "WebRTC",
             url: "https://github.com/shiguredo/sora-ios-sdk-specs/releases/download/\(file)",
-            checksum: "5554e0bb76ee56584d2e3a317dd01a27804dc6411c7ae163cec525c668262a44"
+            checksum: "237dcac806176bf46db759b8dd2b9d39542ad71414dd07c26a492cdeae91fd19"
         ),
         .target(
             name: "Sora",
diff --git a/Podfile b/Podfile
index b0219942..d831fb11 100644
--- a/Podfile
+++ b/Podfile
@@ -5,5 +5,5 @@ platform :ios, '13.0'
 
 target 'Sora' do
   use_frameworks!
-  pod 'WebRTC', '102.5005.7.6'
+  pod 'WebRTC', '103.5060.4.0'
 end
diff --git a/Podfile.dev b/Podfile.dev
index 00a61808..dc996938 100644
--- a/Podfile.dev
+++ b/Podfile.dev
@@ -5,7 +5,7 @@ platform :ios, '13.0'
 
 target 'Sora' do
   use_frameworks!
-  pod 'WebRTC', '102.5005.7.6'
+  pod 'WebRTC', '103.5060.4.0'
   pod 'SwiftLint', '0.45.1'
   pod 'SwiftFormat/CLI', '0.49.0'
 end
diff --git a/README.md b/README.md
index a2986201..4dc3f590 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # Sora iOS SDK
 
-[![libwebrtc](https://img.shields.io/badge/libwebrtc-102.5005.7.6-blue.svg)](https://chromium.googlesource.com/external/webrtc/+/branch-heads/5005
+[![libwebrtc](https://img.shields.io/badge/libwebrtc-103.5060-blue.svg)](https://chromium.googlesource.com/external/webrtc/+/branch-heads/5060
 [![GitHub tag](https://img.shields.io/github/tag/shiguredo/sora-ios-sdk.svg)](https://github.com/shiguredo/sora-ios-sdk)
 [![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)
 
@@ -20,11 +20,11 @@ Please read https://github.com/shiguredo/oss before use.
 
 - iOS 13 以降
 - アーキテクチャ arm64, x86_64 (シミュレーターの動作は未保証)
-- macOS 12.2 以降
+- macOS 12.3 以降
 - Xcode 13.4
 - Swift 5.6.1
 - CocoaPods 1.11.2 以降
-- WebRTC SFU Sora 2021.2 以降
+- WebRTC SFU Sora 2022.1 以降
 
 Xcode と Swift のバージョンによっては、 CocoaPods で取得できるバイナリに互換性がない可能性があります。詳しくはドキュメントを参照してください。
 
diff --git a/Sora.podspec b/Sora.podspec
index 65d804cc..8be16221 100644
--- a/Sora.podspec
+++ b/Sora.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name         = "Sora"
-  s.version      = "2022.3.0"
+  s.version      = "2022.4.0"
   s.summary      = "Sora iOS SDK"
   s.description  = <<-DESC
                    A library to develop Sora client applications.
@@ -15,7 +15,7 @@ Pod::Spec.new do |s|
   }
   s.source_files  = "Sora/**/*.swift"
   s.resources = ['Sora/*.xib']
-  s.dependency "WebRTC", '102.5005.7.6'
+  s.dependency "WebRTC", '103.5060.4.0'
   s.pod_target_xcconfig = {
     'ARCHS' => 'arm64',
     'ARCHS[config=Debug]' => '$(ARCHS_STANDARD)'
diff --git a/Sora.xcodeproj/project.pbxproj b/Sora.xcodeproj/project.pbxproj
index 8da88b12..d5d15f05 100644
--- a/Sora.xcodeproj/project.pbxproj
+++ b/Sora.xcodeproj/project.pbxproj
@@ -592,7 +592,7 @@
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
 				IPHONEOS_DEPLOYMENT_TARGET = 13.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
-				MARKETING_VERSION = 2022.3.0;
+				MARKETING_VERSION = 2022.4.0;
 				PRODUCT_BUNDLE_IDENTIFIER = jp.shiguredo.sora.ios.sdk.Sora;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				PROVISIONING_PROFILE = "";
@@ -625,7 +625,7 @@
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
 				IPHONEOS_DEPLOYMENT_TARGET = 13.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
-				MARKETING_VERSION = 2022.3.0;
+				MARKETING_VERSION = 2022.4.0;
 				PRODUCT_BUNDLE_IDENTIFIER = jp.shiguredo.sora.ios.sdk.Sora;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				PROVISIONING_PROFILE = "";
diff --git a/Sora/Configuration.swift b/Sora/Configuration.swift
index 42aea33e..322a5134 100644
--- a/Sora/Configuration.swift
+++ b/Sora/Configuration.swift
@@ -37,6 +37,8 @@ public struct Configuration {
     /// クライアント ID
     public var clientId: String?
 
+    /// バンドル ID
+    public var bundleId: String?
     /// ロール
     public var role: Role
 
diff --git a/Sora/MediaChannel.swift b/Sora/MediaChannel.swift
index 62b28c79..ac324aae 100644
--- a/Sora/MediaChannel.swift
+++ b/Sora/MediaChannel.swift
@@ -129,6 +129,13 @@ public final class MediaChannel {
         peerChannel.clientId
     }
 
+    /**
+        バンドル ID 。接続後にセットされます。
+     */
+    public var bundleId: String? {
+        peerChannel.bundleId
+    }
+
     /**
      接続 ID 。接続後にセットされます。
      */
diff --git a/Sora/PackageInfo.swift b/Sora/PackageInfo.swift
index 1e62d763..0e08c915 100644
--- a/Sora/PackageInfo.swift
+++ b/Sora/PackageInfo.swift
@@ -1,7 +1,7 @@
 /// :nodoc:
 public enum SDKInfo {
     // Sora iOS SDK のバージョンを定義する
-    public static let version = "2022.3.0"
+    public static let version = "2022.4.0"
 }
 
 /**
@@ -9,16 +9,16 @@ public enum SDKInfo {
  */
 public enum WebRTCInfo {
     /// WebRTC フレームワークのバージョン
-    public static let version = "M102"
+    public static let version = "M103"
 
     /// WebRTC フレームワークのコミットポジション
-    public static let commitPosition = "7"
+    public static let commitPosition = "4"
 
     /// WebRTC フレームワークのメンテナンスバージョン
-    public static let maintenanceVersion = "6"
+    public static let maintenanceVersion = "0"
 
     /// WebRTC フレームワークのソースコードのリビジョン
-    public static let revision = "6ff73180ad01aca444c9856f91148eb2b948ce63"
+    public static let revision = "cd3ae79bce5516336481fd0a689499601b57d1bc"
 
     /// WebRTC フレームワークのソースコードのリビジョン (短縮版)
     public static var shortRevision: String {
diff --git a/Sora/PeerChannel.swift b/Sora/PeerChannel.swift
index 12d66e8c..d22b2cc3 100644
--- a/Sora/PeerChannel.swift
+++ b/Sora/PeerChannel.swift
@@ -110,6 +110,7 @@ class PeerChannel: NSObject, RTCPeerConnectionDelegate {
 
     var webRTCConfiguration: WebRTCConfiguration
     var clientId: String?
+    var bundleId: String?
     var connectionId: String?
 
     var onConnectHandler: ((Error?) -> Void)?
@@ -288,11 +289,12 @@ class PeerChannel: NSObject, RTCPeerConnectionDelegate {
 
         let webRTCVersion = "Shiguredo-build \(WebRTCInfo.version) (\(WebRTCInfo.version).\(WebRTCInfo.commitPosition).\(WebRTCInfo.maintenanceVersion) \(WebRTCInfo.shortRevision))"
 
-        let simulcast = configuration.simulcastEnabled || configuration.spotlightEnabled == .enabled
+        let simulcast = configuration.simulcastEnabled
         let connect = SignalingConnect(
             role: role,
             channelId: configuration.channelId,
             clientId: configuration.clientId,
+            bundleId: configuration.bundleId,
             metadata: configuration.signalingConnectMetadata,
             notifyMetadata: configuration.signalingConnectNotifyMetadata,
             sdp: sdp,
@@ -385,15 +387,11 @@ class PeerChannel: NSObject, RTCPeerConnectionDelegate {
                 }
             }
         } else {
-            // mid なし
-            if let track = stream.nativeVideoTrack {
-                nativeChannel.add(track,
-                                  streamIds: [stream.nativeStream.streamId])
-            }
-            if let track = stream.nativeAudioTrack {
-                nativeChannel.add(track,
-                                  streamIds: [stream.nativeStream.streamId])
-            }
+            // mid なしの場合はエラーにする
+            Logger.error(type: .peerChannel, message: "mid not found")
+            disconnect(error: SoraError.peerChannelError(reason: "mid not found"),
+                       reason: .signalingFailure)
+            return
         }
 
         // マイクの初期化
@@ -786,6 +784,7 @@ class PeerChannel: NSObject, RTCPeerConnectionDelegate {
             signalingChannel.setConnectedUrl()
 
             clientId = offer.clientId
+            bundleId = offer.bundleId
             connectionId = offer.connectionId
             if let dataChannels = offer.dataChannels {
                 signalingChannel.dataChannelSignaling = true
diff --git a/Sora/Signaling.swift b/Sora/Signaling.swift
index 93d76064..eef9c2a9 100644
--- a/Sora/Signaling.swift
+++ b/Sora/Signaling.swift
@@ -11,24 +11,26 @@ private func serializeMetadataList(_ data: Any?) -> [SignalingNotifyMetadata]? {
 
     let result = array.map { (dict: [String: Any]) -> SignalingNotifyMetadata in
         var signalingNotifyMetadata = SignalingNotifyMetadata()
-        if dict.keys.contains("client_id"), let clinetId = dict["client_id"] as? String? {
+        if let clinetId = dict["client_id"] as? String {
             signalingNotifyMetadata.clientId = clinetId
         }
-
-        if dict.keys.contains("connection_id"), let connectionId = dict["connection_id"] as? String? {
+        if let bundleId = dict["bundle_id"] as? String {
+            signalingNotifyMetadata.bundleId = bundleId
+        }
+        if let connectionId = dict["connection_id"] as? String {
             signalingNotifyMetadata.connectionId = connectionId
         }
 
-        if dict.keys.contains("authn_metadata") {
-            signalingNotifyMetadata.authnMetadata = dict["authn_metadata"]
+        if let authnMetadata = dict["authn_metadata"] {
+            signalingNotifyMetadata.authnMetadata = authnMetadata
         }
 
-        if dict.keys.contains("authz_metadata") {
-            signalingNotifyMetadata.authzMetadata = dict["authz_metadata"]
+        if let authzMetada = dict["authz_metadata"] {
+            signalingNotifyMetadata.authzMetadata = authzMetada
         }
 
-        if dict.keys.contains("metadata") {
-            signalingNotifyMetadata.metadata = dict["metadata"]
+        if let metadata = dict["metadata"] {
+            signalingNotifyMetadata.metadata = metadata
         }
 
         return signalingNotifyMetadata
@@ -53,33 +55,33 @@ private func updateMetadata(signaling: Signaling, data: Data) -> Signaling {
     switch signaling {
     case var .offer(message):
         // TODO: if json.keys.contains("key") を if let に書き換えたい
-        if json.keys.contains("metadata") {
-            message.metadata = json["metadata"]
+        if let metadata = json["metadata"] {
+            message.metadata = metadata
         }
         if let dataChannels = json["data_channels"] as? [[String: Any]] {
             message.dataChannels = dataChannels
         }
         return .offer(message)
     case var .push(message):
-        if json.keys.contains("data") {
-            message.data = json["data"]
+        if let data = json["data"] {
+            message.data = data
         }
         return .push(message)
     case var .notify(message):
-        if json.keys.contains("authn_metadata") {
-            message.authnMetadata = json["authn_metadata"]
+        if let authnMetadata = json["authn_metadata"] {
+            message.authnMetadata = authnMetadata
         }
-        if json.keys.contains("authz_metadata") {
-            message.authzMetadata = json["authz_metadata"]
+        if let authzMetadata = json["authz_metadata"] {
+            message.authzMetadata = authzMetadata
         }
-        if json.keys.contains("metadata") {
-            message.metadata = json["metadata"]
+        if let metadata = json["metadata"] {
+            message.metadata = metadata
         }
-        if json.keys.contains("metadata_list") {
-            message.metadataList = serializeMetadataList(json["metadata_list"])
+        if let metadataList = json["metadata_list"] {
+            message.metadataList = serializeMetadataList(metadataList)
         }
-        if json.keys.contains("data") {
-            message.data = serializeMetadataList(json["data"])
+        if let data = json["data"] {
+            message.data = serializeMetadataList(data)
         }
         return .notify(message)
     default:
@@ -242,6 +244,9 @@ public struct SignalingNotifyMetadata {
     /// クライアント ID
     public var clientId: String?
 
+    /// バンドル ID
+    public var bundleId: String?
+
     /// 接続 ID
     public var connectionId: String?
 
@@ -269,6 +274,9 @@ public struct SignalingConnect {
     /// クライアント ID
     public var clientId: String?
 
+    /// バンドル ID
+    public var bundleId: String?
+
     /// メタデータ
     public var metadata: Encodable?
 
@@ -418,6 +426,9 @@ public struct SignalingOffer {
     /// クライアント ID
     public let clientId: String
 
+    /// バンドル ID
+    public let bundleId: String?
+
     /// 接続 ID
     public let connectionId: String
 
@@ -533,6 +544,9 @@ public struct SignalingNotify {
     /// クライアント ID
     public var clientId: String?
 
+    /// バンドル ID
+    public var bundleId: String?
+
     /// 接続 ID
     public var connectionId: String?
 
@@ -800,6 +814,7 @@ extension SignalingConnect: Codable {
         case role
         case channel_id
         case client_id
+        case bundle_id
         case metadata
         case signaling_notify_metadata
         case sdp
@@ -840,6 +855,7 @@ extension SignalingConnect: Codable {
         try container.encode(role, forKey: .role)
         try container.encode(channelId, forKey: .channel_id)
         try container.encodeIfPresent(clientId, forKey: .client_id)
+        try container.encodeIfPresent(bundleId, forKey: .bundle_id)
         try container.encodeIfPresent(sdp, forKey: .sdp)
         let metadataEnc = container.superEncoder(forKey: .metadata)
         try metadata?.encode(to: metadataEnc)
@@ -959,6 +975,7 @@ extension SignalingOffer.Encoding: Codable {
 extension SignalingOffer: Codable {
     enum CodingKeys: String, CodingKey {
         case client_id
+        case bundle_id
         case connection_id
         case sdp
         case config
@@ -969,6 +986,7 @@ extension SignalingOffer: Codable {
     public init(from decoder: Decoder) throws {
         let container = try decoder.container(keyedBy: CodingKeys.self)
         clientId = try container.decode(String.self, forKey: .client_id)
+        bundleId = try container.decodeIfPresent(String.self, forKey: .bundle_id)
         connectionId = try container.decode(String.self, forKey: .connection_id)
         sdp = try container.decode(String.self, forKey: .sdp)
         configuration =
@@ -1083,6 +1101,7 @@ extension SignalingNotify: Codable {
         case event_type
         case role
         case client_id
+        case bundle_id
         case connection_id
         case audio
         case video
@@ -1105,6 +1124,7 @@ extension SignalingNotify: Codable {
                                          forKey: .event_type)
         role = try container.decodeIfPresent(SignalingRole.self, forKey: .role)
         clientId = try container.decodeIfPresent(String.self, forKey: .client_id)
+        bundleId = try container.decodeIfPresent(String.self, forKey: .bundle_id)
         connectionId = try container.decodeIfPresent(String.self,
                                                      forKey: .connection_id)
         audioEnabled = try container.decodeIfPresent(Bool.self, forKey: .audio)