diff --git a/ports/microsoft-signalr/fix-miss-header.patch b/ports/microsoft-signalr/fix-miss-header.patch
new file mode 100644
index 0000000000..f929c373f6
--- /dev/null
+++ b/ports/microsoft-signalr/fix-miss-header.patch
@@ -0,0 +1,36 @@
+diff --git a/src/signalrclient/binary_message_parser.h b/src/signalrclient/binary_message_parser.h
+index 349b979..f33533d 100644
+--- a/src/signalrclient/binary_message_parser.h
++++ b/src/signalrclient/binary_message_parser.h
+@@ -5,6 +5,7 @@
+ #pragma once
+ 
+ #ifdef USE_MSGPACK
++#include <cstddef>
+ 
+ namespace signalr
+ {
+diff --git a/src/signalrclient/signalr_client_config.cpp b/src/signalrclient/signalr_client_config.cpp
+index adbc3ae..dbca837 100644
+--- a/src/signalrclient/signalr_client_config.cpp
++++ b/src/signalrclient/signalr_client_config.cpp
+@@ -5,6 +5,7 @@
+ #include "stdafx.h"
+ #include "signalrclient/signalr_client_config.h"
+ #include "signalr_default_scheduler.h"
++#include <stdexcept>
+ 
+ namespace signalr
+ {
+diff --git a/src/signalrclient/transport_factory.cpp b/src/signalrclient/transport_factory.cpp
+index 7443672..a8add79 100644
+--- a/src/signalrclient/transport_factory.cpp
++++ b/src/signalrclient/transport_factory.cpp
+@@ -6,6 +6,7 @@
+ #include "transport_factory.h"
+ #include "websocket_transport.h"
+ #include "signalrclient/websocket_client.h"
++#include <stdexcept>
+ 
+ namespace signalr
+ {
diff --git a/ports/microsoft-signalr/portfile.cmake b/ports/microsoft-signalr/portfile.cmake
index 9fb32c3303..96dd2d53e9 100644
--- a/ports/microsoft-signalr/portfile.cmake
+++ b/ports/microsoft-signalr/portfile.cmake
@@ -16,6 +16,7 @@ vcpkg_from_github(
     PATCHES
         find-msgpack.patch
         "${PATCH_FIX_GCC_13_COMPILATION}"
+        fix-miss-header.patch
 )
 
 vcpkg_check_features(
diff --git a/ports/microsoft-signalr/vcpkg.json b/ports/microsoft-signalr/vcpkg.json
index 7d79186ce5..502101e735 100644
--- a/ports/microsoft-signalr/vcpkg.json
+++ b/ports/microsoft-signalr/vcpkg.json
@@ -1,7 +1,7 @@
 {
   "name": "microsoft-signalr",
   "version": "0.1.0-alpha4",
-  "port-version": 11,
+  "port-version": 12,
   "description": "C++ Client for ASP.NET Core SignalR.",
   "homepage": "https://github.com/aspnet/SignalR-Client-Cpp",
   "dependencies": [
diff --git a/versions/baseline.json b/versions/baseline.json
index 8918c3292a..9cb50e29e3 100644
--- a/versions/baseline.json
+++ b/versions/baseline.json
@@ -5850,7 +5850,7 @@
     },
     "microsoft-signalr": {
       "baseline": "0.1.0-alpha4",
-      "port-version": 11
+      "port-version": 12
     },
     "mikktspace": {
       "baseline": "2020-10-06",
diff --git a/versions/m-/microsoft-signalr.json b/versions/m-/microsoft-signalr.json
index 23f45ebda8..7a0831f88a 100644
--- a/versions/m-/microsoft-signalr.json
+++ b/versions/m-/microsoft-signalr.json
@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "fbeec8cc91b3ef1fd17afc17a0cb7361138ab1a6",
+      "version": "0.1.0-alpha4",
+      "port-version": 12
+    },
     {
       "git-tree": "2b29ee52721e3f9ba79a0348a731d9f8a26ef89a",
       "version": "0.1.0-alpha4",