diff --git a/deps/simdutf/simdutf.cpp b/deps/simdutf/simdutf.cpp
index eb3c53ba069ede..70b461ab550b46 100644
--- a/deps/simdutf/simdutf.cpp
+++ b/deps/simdutf/simdutf.cpp
@@ -1,4 +1,4 @@
-/* auto-generated on 2023-08-11 13:30:54 -0400. Do not edit! */
+/* auto-generated on 2023-10-08 13:48:09 -0400. Do not edit! */
 // dofile: invoked with prepath=/Users/dlemire/CVS/github/simdutf/src, filename=simdutf.cpp
 /* begin file src/simdutf.cpp */
 #include "simdutf.h"
@@ -1119,9 +1119,12 @@ simdutf_really_inline simd16<int16_t>::operator simd16<uint16_t>() const { retur
 #endif
 
 #ifdef _MSC_VER
-#if _MSC_VER >= 1920
-// Visual Studio 2019 and up support VBMI2 under x64 even if the header
+#if _MSC_VER >= 1930
+// Visual Studio 2022 and up support VBMI2 under x64 even if the header
 // avx512vbmi2intrin.h is not found.
+// Visual Studio 2019 technically supports VBMI2, but the implementation
+// might be unreliable. Search for visualstudio2019icelakeissue in our
+// tests.
 #define SIMDUTF_COMPILER_SUPPORTS_VBMI2 1
 #endif
 #endif
diff --git a/deps/simdutf/simdutf.h b/deps/simdutf/simdutf.h
index 22a49f48c6bc95..6ab1c34d7b30a7 100644
--- a/deps/simdutf/simdutf.h
+++ b/deps/simdutf/simdutf.h
@@ -1,4 +1,4 @@
-/* auto-generated on 2023-08-11 13:30:54 -0400. Do not edit! */
+/* auto-generated on 2023-10-08 13:48:09 -0400. Do not edit! */
 // dofile: invoked with prepath=/Users/dlemire/CVS/github/simdutf/include, filename=simdutf.h
 /* begin file include/simdutf.h */
 #ifndef SIMDUTF_H
@@ -576,7 +576,7 @@ SIMDUTF_DISABLE_UNDESIRED_WARNINGS
 #define SIMDUTF_SIMDUTF_VERSION_H
 
 /** The version of simdutf being used (major.minor.revision) */
-#define SIMDUTF_VERSION "3.2.17"
+#define SIMDUTF_VERSION "3.2.18"
 
 namespace simdutf {
 enum {
@@ -591,7 +591,7 @@ enum {
   /**
    * The revision (major.minor.REVISION) of simdutf being used.
    */
-  SIMDUTF_VERSION_REVISION = 17
+  SIMDUTF_VERSION_REVISION = 18
 };
 } // namespace simdutf
 
diff --git a/doc/contributing/maintaining/maintaining-dependencies.md b/doc/contributing/maintaining/maintaining-dependencies.md
index f4f125eafba148..93a97afa5c64ca 100644
--- a/doc/contributing/maintaining/maintaining-dependencies.md
+++ b/doc/contributing/maintaining/maintaining-dependencies.md
@@ -27,7 +27,7 @@ This a list of all the dependencies:
 * [npm 9.6.7][]
 * [openssl 3.0.8][]
 * [postject 1.0.0-alpha.6][]
-* [simdutf 3.2.17][]
+* [simdutf 3.2.18][]
 * [undici 5.25.4][]
 * [uvwasi 0.0.19][]
 * [V8 11.8.172.12][]
@@ -286,7 +286,7 @@ See [maintaining-openssl][] for more informations.
 The [postject](https://github.com/nodejs/postject) dependency is used for the
 [Single Executable strategic initiative](https://github.com/nodejs/single-executable).
 
-### simdutf 3.2.17
+### simdutf 3.2.18
 
 The [simdutf](https://github.com/simdutf/simdutf) dependency is
 a C++ library for fast UTF-8 decoding and encoding.
@@ -344,7 +344,7 @@ performance improvements not currently available in standard zlib.
 [npm 9.6.7]: #npm-967
 [openssl 3.0.8]: #openssl-308
 [postject 1.0.0-alpha.6]: #postject-100-alpha6
-[simdutf 3.2.17]: #simdutf-3217
+[simdutf 3.2.18]: #simdutf-3218
 [undici 5.25.4]: #undici-5254
 [update-openssl-action]: ../../../.github/workflows/update-openssl.yml
 [uvwasi 0.0.19]: #uvwasi-0019