diff --git a/ports/simdutf/portfile.cmake b/ports/simdutf/portfile.cmake
index bbd029e1fd220f..dd5bb6a3b68767 100644
--- a/ports/simdutf/portfile.cmake
+++ b/ports/simdutf/portfile.cmake
@@ -2,7 +2,7 @@ vcpkg_from_github(
     OUT_SOURCE_PATH SOURCE_PATH
     REPO simdutf/simdutf
     REF "v${VERSION}"
-    SHA512 bbea06676b61e3b13187576830cba1c20fba0161dfabefacd167c25f55410aa8872cfcc4f21277fe339e2833e7a0da2375e1b5e489be2986c3576f35d57bda3d
+    SHA512 304e4d7da77aad4c59c3e440130b1c74f71ad3d24ca1c93a341804007fc112f9ee914563cefb0c66b5d7c6dc875ecb4363fd01bf3402c31398c8db57862bce3b
     HEAD_REF master
 )
 
diff --git a/ports/simdutf/vcpkg.json b/ports/simdutf/vcpkg.json
index 24016cf8e84631..ed6df518688e77 100644
--- a/ports/simdutf/vcpkg.json
+++ b/ports/simdutf/vcpkg.json
@@ -1,6 +1,6 @@
 {
   "name": "simdutf",
-  "version-semver": "6.3.1",
+  "version-semver": "6.4.0",
   "description": "Unicode validation and transcoding at billions of characters per second",
   "homepage": "https://github.com/simdutf/simdutf",
   "license": "Apache-2.0 OR MIT",
diff --git a/versions/baseline.json b/versions/baseline.json
index d66bbff51fcb1b..1d895ec8cc443f 100644
--- a/versions/baseline.json
+++ b/versions/baseline.json
@@ -8549,7 +8549,7 @@
       "port-version": 0
     },
     "simdutf": {
-      "baseline": "6.3.1",
+      "baseline": "6.4.0",
       "port-version": 0
     },
     "simonbrunel-qtpromise": {
diff --git a/versions/s-/simdutf.json b/versions/s-/simdutf.json
index e5861f8faf8cc8..f2472004764329 100644
--- a/versions/s-/simdutf.json
+++ b/versions/s-/simdutf.json
@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "5222624e17cf161924330ee20ee4d9492f176f0d",
+      "version-semver": "6.4.0",
+      "port-version": 0
+    },
     {
       "git-tree": "3a7cc98abfa9919cfaf3e5f984072e9cbb258228",
       "version-semver": "6.3.1",