diff --git a/ports/mas-bandwidth-serialize/portfile.cmake b/ports/mas-bandwidth-serialize/portfile.cmake
index aa1881eb50..398a35585b 100644
--- a/ports/mas-bandwidth-serialize/portfile.cmake
+++ b/ports/mas-bandwidth-serialize/portfile.cmake
@@ -4,7 +4,7 @@ vcpkg_from_github(
     OUT_SOURCE_PATH SOURCE_PATH
     REPO mas-bandwidth/serialize
     REF "v${VERSION}"
-    SHA512 8f66674d3b840c76a432bac55dbee6d2124479dcab5b65009651978166b28e3273e1664e4442f27e010c642cf93407bf2e9ef9bd6da45f3b4dc50da0b714f770
+    SHA512 16342bd5114c3a4bfde6479d897b49aeaccba2a3f18f3738c64e52a58957eeae29e100362e36e1d852666d72ee437513e6ea5bf7196e9d9db1e06f0fc94684bf
     HEAD_REF main
 )
 
diff --git a/ports/mas-bandwidth-serialize/vcpkg.json b/ports/mas-bandwidth-serialize/vcpkg.json
index bf8b17ba6a..aae082cb9b 100644
--- a/ports/mas-bandwidth-serialize/vcpkg.json
+++ b/ports/mas-bandwidth-serialize/vcpkg.json
@@ -1,6 +1,6 @@
 {
   "name": "mas-bandwidth-serialize",
-  "version": "1.5.0",
+  "version": "1.9.0",
   "description": "A simple bitpacking serializer for C++.",
   "homepage": "https://github.com/mas-bandwidth/serialize",
   "license": "BSD-3-Clause",
diff --git a/versions/baseline.json b/versions/baseline.json
index 4d045eb2f6..5c42b34442 100644
--- a/versions/baseline.json
+++ b/versions/baseline.json
@@ -6477,7 +6477,7 @@
       "port-version": 0
     },
     "mas-bandwidth-serialize": {
-      "baseline": "1.5.0",
+      "baseline": "1.9.0",
       "port-version": 0
     },
     "mas-bandwidth-yojimbo": {
diff --git a/versions/m-/mas-bandwidth-serialize.json b/versions/m-/mas-bandwidth-serialize.json
index b33540898d..e0ec545cbc 100644
--- a/versions/m-/mas-bandwidth-serialize.json
+++ b/versions/m-/mas-bandwidth-serialize.json
@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "13776615a4906d7e99774986c2e5a9354dbceb61",
+      "version": "1.9.0",
+      "port-version": 0
+    },
     {
       "git-tree": "f9529cc3ed33e806ec8f5860e2314b21f42e5d86",
       "version": "1.5.0",