diff --git a/ports/scnlib/portfile.cmake b/ports/scnlib/portfile.cmake
index 0b15af4f838737..fb0324ff299a54 100644
--- a/ports/scnlib/portfile.cmake
+++ b/ports/scnlib/portfile.cmake
@@ -6,6 +6,9 @@ vcpkg_from_github(
     REF "v${VERSION}"
     SHA512 db14d71da3c1ecb849f00ac1e334f39c532592230e950aa1009ff00ba56670cb71e33ca457fd4ac66595ff43f0dca0e42d45f672848b9cde3cba80f19ef8693f
     HEAD_REF master
+    PATCHES
+        # support fast_float 7.0.0
+        scnlib-pr-136.patch
 )
 
 vcpkg_cmake_configure(
diff --git a/ports/scnlib/scnlib-pr-136.patch b/ports/scnlib/scnlib-pr-136.patch
new file mode 100644
index 00000000000000..f3ecee9c6ebd43
--- /dev/null
+++ b/ports/scnlib/scnlib-pr-136.patch
@@ -0,0 +1,26 @@
+diff --git a/src/scn/impl.cpp b/src/scn/impl.cpp
+index aa0d334..ab859a4 100644
+--- a/src/scn/impl.cpp
++++ b/src/scn/impl.cpp
+@@ -721,15 +721,17 @@ scan_expected<std::ptrdiff_t> fast_float_fallback(impl_init_data<CharT> data,
+ struct fast_float_impl_base : impl_base {
+     fast_float::chars_format get_flags() const
+     {
+-        unsigned format_flags{};
++        fast_float::chars_format format_flags{};
+         if ((m_options & float_reader_base::allow_fixed) != 0) {
+-            format_flags |= fast_float::fixed;
++            format_flags =
++                static_cast<fast_float::chars_format>(format_flags | fast_float::chars_format::fixed);
+         }
+         if ((m_options & float_reader_base::allow_scientific) != 0) {
+-            format_flags |= fast_float::scientific;
++            format_flags =
++                static_cast<fast_float::chars_format>(format_flags | fast_float::chars_format::scientific);
+         }
+ 
+-        return static_cast<fast_float::chars_format>(format_flags);
++        return format_flags;
+     }
+ };
+ 
diff --git a/ports/scnlib/vcpkg.json b/ports/scnlib/vcpkg.json
index ec304e0ab54598..464e91ae0c60f5 100644
--- a/ports/scnlib/vcpkg.json
+++ b/ports/scnlib/vcpkg.json
@@ -1,6 +1,7 @@
 {
   "name": "scnlib",
   "version": "4.0.1",
+  "port-version": 1,
   "description": "scnlib is a modern C++ library for replacing scanf and std::istream",
   "homepage": "https://scnlib.dev/",
   "license": "Apache-2.0",
diff --git a/versions/baseline.json b/versions/baseline.json
index 3204cc05e572d9..92774cc4052083 100644
--- a/versions/baseline.json
+++ b/versions/baseline.json
@@ -8190,7 +8190,7 @@
     },
     "scnlib": {
       "baseline": "4.0.1",
-      "port-version": 0
+      "port-version": 1
     },
     "scope-guard": {
       "baseline": "1.1.0",
diff --git a/versions/s-/scnlib.json b/versions/s-/scnlib.json
index 981f68aae8b4e8..b015ac78fb5a68 100644
--- a/versions/s-/scnlib.json
+++ b/versions/s-/scnlib.json
@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "b26c97d1ad11fc4a361f470db0f66b9afccd218c",
+      "version": "4.0.1",
+      "port-version": 1
+    },
     {
       "git-tree": "c4f32fa5eff83c4abe03aa721dcc57c3fd3f0a02",
       "version": "4.0.1",