diff --git a/ports/flatbuffers/fix-runtime-flags-msvc.patch b/ports/flatbuffers/fix-runtime-flags-msvc.patch
new file mode 100644
index 0000000000..b9d30674bc
--- /dev/null
+++ b/ports/flatbuffers/fix-runtime-flags-msvc.patch
@@ -0,0 +1,19 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index f7f388f..4ab8149 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -456,12 +456,14 @@ if(FLATBUFFERS_BUILD_FLATC)
+   endif()
+ 
+   target_link_libraries(flatc PRIVATE $<BUILD_INTERFACE:ProjectConfig>)
++  if(FALSE) # DONT mess with runtime flags
+   target_compile_options(flatc
+     PRIVATE
+       $<$<AND:$<BOOL:${MSVC_LIKE}>,$<CONFIG:Release>>:
+         /MT
+       >
+   )
++  endif()
+ 
+   if(FLATBUFFERS_CODE_SANITIZE AND NOT WIN32)
+     add_fsanitize_to_target(flatc ${FLATBUFFERS_CODE_SANITIZE})
diff --git a/ports/flatbuffers/portfile.cmake b/ports/flatbuffers/portfile.cmake
index 0780b0fef2..3bf1acf84c 100644
--- a/ports/flatbuffers/portfile.cmake
+++ b/ports/flatbuffers/portfile.cmake
@@ -8,6 +8,7 @@ vcpkg_from_github(
     HEAD_REF master
     PATCHES
         fix-uwp-build.patch
+        fix-runtime-flags-msvc.patch
 )
 
 set(options "")
diff --git a/ports/flatbuffers/vcpkg.json b/ports/flatbuffers/vcpkg.json
index b2c9f03450..b72e9ff018 100644
--- a/ports/flatbuffers/vcpkg.json
+++ b/ports/flatbuffers/vcpkg.json
@@ -1,6 +1,7 @@
 {
   "name": "flatbuffers",
   "version": "25.9.23",
+  "port-version": 1,
   "description": "FlatBuffers is a cross platform serialization library architected for maximum memory efficiency. It allows you to directly access serialized data without parsing/unpacking it first, while still having great forwards/backwards compatibility.",
   "homepage": "https://google.github.io/flatbuffers/",
   "license": "Apache-2.0",
diff --git a/versions/baseline.json b/versions/baseline.json
index 4c4a2ea2e5..6c14c0e719 100644
--- a/versions/baseline.json
+++ b/versions/baseline.json
@@ -2970,7 +2970,7 @@
     },
     "flatbuffers": {
       "baseline": "25.9.23",
-      "port-version": 0
+      "port-version": 1
     },
     "flatbush": {
       "baseline": "1.3.0",
diff --git a/versions/f-/flatbuffers.json b/versions/f-/flatbuffers.json
index a3f4ce0666..de48a3e748 100644
--- a/versions/f-/flatbuffers.json
+++ b/versions/f-/flatbuffers.json
@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "cf3ccaa4a8abd4a9dcc02a2006d3387e13e3a94c",
+      "version": "25.9.23",
+      "port-version": 1
+    },
     {
       "git-tree": "34977bf5c6ebc9b593376b223f82a21e1c945d42",
       "version": "25.9.23",