diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6621899f2..d6c736f55 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## [2.4.1] - 2024-10-07
+### Fixed
+* 無名のクライアントが複数いるときclient_idの振り分けが間違っておりcall_responseが正しく返らないバグを修正 (#412)
+
 ## [2.4.0] - 2024-10-02
 ### Changed
 * Logメッセージを仕様変更、Logに名前をつけて複数送信できるようになった (#410)
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 917f57641..1e0d58a1e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.5)
 
-project(webcface VERSION 2.4.0)
+project(webcface VERSION 2.4.1)
 
 if(CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
     set(IS_MAIN on)
diff --git a/Doxyfile b/Doxyfile
index d2f9dedbc..52790d5e7 100644
--- a/Doxyfile
+++ b/Doxyfile
@@ -48,7 +48,7 @@ PROJECT_NAME           = "WebCFace"
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = "2.4.0"
+PROJECT_NUMBER         = "2.4.1"
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a
diff --git a/README.md b/README.md
index 85f02d1c3..dabdcc22b 100644
--- a/README.md
+++ b/README.md
@@ -195,9 +195,9 @@ Ubuntu20.04でビルドしているため、それより古いUbuntuでは動作
 <details open><summary>x86_64</summary>
 
 ```sh
-curl -fLO https://github.com/na-trium-144/webcface-package/releases/download/v2.4.0-1/webcface_2.4.0-1_linux_amd64.zip
-sudo unzip webcface_2.4.0-1_linux_amd64.zip -d /opt/webcface
-rm webcface_2.4.0-1_linux_amd64.zip
+curl -fLO https://github.com/na-trium-144/webcface-package/releases/download/v2.4.1/webcface_2.4.1_linux_amd64.zip
+sudo unzip webcface_2.4.1_linux_amd64.zip -d /opt/webcface
+rm webcface_2.4.1_linux_amd64.zip
 echo 'export PATH="/opt/webcface/bin:$PATH"' >> ~/.bashrc
 echo 'export PKG_CONFIG_PATH="/opt/webcface/lib/x86_64-linux-gnu/pkgconfig:$PKG_CONFIG_PATH"' >> ~/.bashrc
 sudo ln -sf /opt/webcface/lib/systemd/system/*.service /etc/systemd/system/
@@ -207,9 +207,9 @@ sudo ln -sf /opt/webcface/lib/systemd/system/*.service /etc/systemd/system/
 <details><summary>arm64</summary>
 
 ```sh
-curl -fLO https://github.com/na-trium-144/webcface-package/releases/download/v2.4.0-1/webcface_2.4.0-1_linux_arm64.zip
-sudo unzip webcface_2.4.0-1_linux_arm64.zip -d /opt/webcface
-rm webcface_2.4.0-1_linux_arm64.zip
+curl -fLO https://github.com/na-trium-144/webcface-package/releases/download/v2.4.1/webcface_2.4.1_linux_arm64.zip
+sudo unzip webcface_2.4.1_linux_arm64.zip -d /opt/webcface
+rm webcface_2.4.1_linux_arm64.zip
 echo 'export PATH="/opt/webcface/bin:$PATH"' >> ~/.bashrc
 echo 'export PKG_CONFIG_PATH="/opt/webcface/lib/aarch64-linux-gnu/pkgconfig:$PKG_CONFIG_PATH"' >> ~/.bashrc
 sudo ln -sf /opt/webcface/lib/systemd/system/*.service /etc/systemd/system/
@@ -219,9 +219,9 @@ sudo ln -sf /opt/webcface/lib/systemd/system/*.service /etc/systemd/system/
 <details><summary>armhf</summary>
 
 ```sh
-curl -fLO https://github.com/na-trium-144/webcface-package/releases/download/v2.4.0-1/webcface_2.4.0-1_linux_armhf.zip
-sudo unzip webcface_2.4.0-1_linux_armhf.zip -d /opt/webcface
-rm webcface_2.4.0-1_linux_armhf.zip
+curl -fLO https://github.com/na-trium-144/webcface-package/releases/download/v2.4.1/webcface_2.4.1_linux_armhf.zip
+sudo unzip webcface_2.4.1_linux_armhf.zip -d /opt/webcface
+rm webcface_2.4.1_linux_armhf.zip
 echo 'export PATH="/opt/webcface/bin:$PATH"' >> ~/.bashrc
 echo 'export PKG_CONFIG_PATH="/opt/webcface/lib/arm-linux-gnueabihf/pkgconfig:$PKG_CONFIG_PATH"' >> ~/.bashrc
 sudo ln -sf /opt/webcface/lib/systemd/system/*.service /etc/systemd/system/
@@ -242,10 +242,10 @@ Ubuntu20.04でビルドしているため、それより古いUbuntuでは動作
 <details open><summary>x86_64</summary>
 
 ```sh
-curl -fLO https://github.com/na-trium-144/webcface/releases/download/v2.4.0/webcface_2.4.0_amd64.deb
+curl -fLO https://github.com/na-trium-144/webcface/releases/download/v2.4.1/webcface_2.4.1_amd64.deb
 curl -fLO https://github.com/na-trium-144/webcface-tools/releases/download/v2.1.0/webcface-tools_2.1.0_amd64.deb
-curl -fLO https://github.com/na-trium-144/webcface-webui/releases/download/v1.9.0/webcface-webui_1.9.0_all.deb
-curl -fLO https://github.com/na-trium-144/webcface-webui/releases/download/v1.9.0/webcface-desktop_1.9.0_linux_amd64.deb
+curl -fLO https://github.com/na-trium-144/webcface-webui/releases/download/v1.9.1/webcface-webui_1.9.1_all.deb
+curl -fLO https://github.com/na-trium-144/webcface-webui/releases/download/v1.9.1/webcface-desktop_1.9.1_linux_amd64.deb
 sudo apt install ./webcface*.deb
 rm ./webcface*.deb
 ```
@@ -254,10 +254,10 @@ rm ./webcface*.deb
 <details><summary>arm64</summary>
 
 ```sh
-curl -fLO https://github.com/na-trium-144/webcface/releases/download/v2.4.0/webcface_2.4.0_arm64.deb
+curl -fLO https://github.com/na-trium-144/webcface/releases/download/v2.4.1/webcface_2.4.1_arm64.deb
 curl -fLO https://github.com/na-trium-144/webcface-tools/releases/download/v2.1.0/webcface-tools_2.1.0_arm64.deb
-curl -fLO https://github.com/na-trium-144/webcface-webui/releases/download/v1.9.0/webcface-webui_1.9.0_all.deb
-curl -fLO https://github.com/na-trium-144/webcface-webui/releases/download/v1.9.0/webcface-desktop_1.9.0_linux_arm64.deb
+curl -fLO https://github.com/na-trium-144/webcface-webui/releases/download/v1.9.1/webcface-webui_1.9.1_all.deb
+curl -fLO https://github.com/na-trium-144/webcface-webui/releases/download/v1.9.1/webcface-desktop_1.9.1_linux_arm64.deb
 sudo apt install ./webcface*.deb
 rm ./webcface*.deb
 ```
@@ -266,10 +266,10 @@ rm ./webcface*.deb
 <details><summary>armhf</summary>
 
 ```sh
-curl -fLO https://github.com/na-trium-144/webcface/releases/download/v2.4.0/webcface_2.4.0_armhf.deb
+curl -fLO https://github.com/na-trium-144/webcface/releases/download/v2.4.1/webcface_2.4.1_armhf.deb
 curl -fLO https://github.com/na-trium-144/webcface-tools/releases/download/v2.1.0/webcface-tools_2.1.0_armhf.deb
-curl -fLO https://github.com/na-trium-144/webcface-webui/releases/download/v1.9.0/webcface-webui_1.9.0_all.deb
-curl -fLO https://github.com/na-trium-144/webcface-webui/releases/download/v1.9.0/webcface-desktop_1.9.0_linux_armv7l.deb
+curl -fLO https://github.com/na-trium-144/webcface-webui/releases/download/v1.9.1/webcface-webui_1.9.1_all.deb
+curl -fLO https://github.com/na-trium-144/webcface-webui/releases/download/v1.9.1/webcface-desktop_1.9.1_linux_armv7l.deb
 sudo apt install ./webcface*.deb
 rm ./webcface*.deb
 ```
@@ -288,16 +288,16 @@ Universalバイナリになっており、IntelMacもAppleシリコンも共通
 macOS 12 (Monterey) でビルドしているので、それより古いMacでは動かないかもしれません。
 
 ```sh
-curl -fLO https://github.com/na-trium-144/webcface-package/releases/download/v2.4.0-1/webcface_2.4.0-1_macos_universal.zip
-curl -fLO https://github.com/na-trium-144/webcface-package/releases/download/v2.4.0-1/webcface-desktop_2.4.0-1_macos_app.zip
+curl -fLO https://github.com/na-trium-144/webcface-package/releases/download/v2.4.1/webcface_2.4.1_macos_universal.zip
+curl -fLO https://github.com/na-trium-144/webcface-package/releases/download/v2.4.1/webcface-desktop_2.4.1_macos_app.zip
 ```
 
 sudo権限が使用できれば以下のように webcface_universal を /opt/webcface に、 webcface-desktop_app を /Applications に展開するのがおすすめです。
 ```sh
-sudo unzip webcface_2.4.0-1_macos_universal.zip -d /opt/webcface
-sudo unzip webcface-desktop_2.4.0-1_macos_app.zip -d /Applications
-rm webcface_2.4.0-1_macos_universal.zip
-rm webcface-desktop_2.4.0-1_macos_app.zip
+sudo unzip webcface_2.4.1_macos_universal.zip -d /opt/webcface
+sudo unzip webcface-desktop_2.4.1_macos_app.zip -d /Applications
+rm webcface_2.4.1_macos_universal.zip
+rm webcface-desktop_2.4.1_macos_app.zip
 ```
 
 また、展開したディレクトリ内の bin/ をPATHに、 lib/pkgconfig/ をPKG_CONFIG_PATHに追加してください。
diff --git a/docs/31_setup.md b/docs/31_setup.md
index bfa791890..6deb3310a 100644
--- a/docs/31_setup.md
+++ b/docs/31_setup.md
@@ -32,7 +32,7 @@ MesonまたはCMakeを使用する場合は、subproject/subdirectoryとしてWe
     ```
     [wrap-git]
     url = https://github.com/na-trium-144/webcface.git
-    revision = v2.4.0
+    revision = v2.4.1
     depth = 1
     [provide]
     dependency_names = webcface
@@ -66,7 +66,7 @@ MesonまたはCMakeを使用する場合は、subproject/subdirectoryとしてWe
     ```cmake
     FetchContent_Declare(webcface
       GIT_REPOSITORY https://github.com/na-trium-144/webcface.git
-      GIT_TAG        v2.4.0
+      GIT_TAG        v2.4.1
     )
     FetchContent_MakeAvailable(webcface)
     ```
diff --git a/meson.build b/meson.build
index 0e9fb41e2..ae3c19ec5 100644
--- a/meson.build
+++ b/meson.build
@@ -1,5 +1,5 @@
 project('webcface', 'c', 'cpp',
-  version: '2.4.0',
+  version: '2.4.1',
   license: 'MIT',
   meson_version: '>=1.3.0',
   default_options: [
@@ -18,7 +18,7 @@ py = find_program('python3')
 
 webcface_abi_major = '20' # ABIの破壊的変更で1増やす
 webcface_abi_minor = '3' # ABIの追加で1増やす
-webcface_webui_version = '1.9.0'
+webcface_webui_version = '1.9.1'
 
 webcface_description = 'Web-based IPC & Dashboard-like UI'
 webcface_contact = 'na-trium-144@users.noreply.github.com'
diff --git a/server-store/src/member_data.cc b/server-store/src/member_data.cc
index b777562e7..bb2064137 100644
--- a/server-store/src/member_data.cc
+++ b/server-store/src/member_data.cc
@@ -162,7 +162,8 @@ void MemberData::onRecv(const std::string &message) {
             auto prev_cli_it = std::find_if(
                 clients_by_id.begin(), clients_by_id.end(),
                 [&](const auto &it) { return it.second->name == this->name; });
-            if (prev_cli_it != clients_by_id.end()) {
+            if (prev_cli_it != clients_by_id.end() && !this->name.empty()) {
+                // すでに同じ名前のクライアントがいたら & 名前が空でなければ そのidを使う
                 this->member_id = v.member_id = prev_cli_it->first;
             } else {
                 // コンストラクタですでに一意のidが振られているはず