diff --git a/deps/simdutf/simdutf.cpp b/deps/simdutf/simdutf.cpp
index bc3da3f340a0ef..eb3c53ba069ede 100644
--- a/deps/simdutf/simdutf.cpp
+++ b/deps/simdutf/simdutf.cpp
@@ -1,4 +1,4 @@
-/* auto-generated on 2023-08-04 13:27:03 -0400. Do not edit! */
+/* auto-generated on 2023-08-11 13:30:54 -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"
@@ -14116,6 +14116,7 @@ result generic_validate_utf8_with_errors(const uint8_t * input, size_t length) {
     reader.advance();
     c.check_eof();
     if (c.errors()) {
+      if (count != 0) { count--; } // Sometimes the error is only detected in the next chunk
       result res = scalar::utf8::rewind_and_validate_with_errors(reinterpret_cast<const char*>(input), reinterpret_cast<const char*>(input) + count, length - count);
       res.count += count;
       return res;
@@ -21759,6 +21760,7 @@ result generic_validate_utf8_with_errors(const uint8_t * input, size_t length) {
     reader.advance();
     c.check_eof();
     if (c.errors()) {
+      if (count != 0) { count--; } // Sometimes the error is only detected in the next chunk
       result res = scalar::utf8::rewind_and_validate_with_errors(reinterpret_cast<const char*>(input), reinterpret_cast<const char*>(input) + count, length - count);
       res.count += count;
       return res;
@@ -23536,6 +23538,7 @@ result generic_validate_utf8_with_errors(const uint8_t * input, size_t length) {
     reader.advance();
     c.check_eof();
     if (c.errors()) {
+      if (count != 0) { count--; } // Sometimes the error is only detected in the next chunk
       result res = scalar::utf8::rewind_and_validate_with_errors(reinterpret_cast<const char*>(input), reinterpret_cast<const char*>(input) + count, length - count);
       res.count += count;
       return res;
@@ -27214,6 +27217,7 @@ result generic_validate_utf8_with_errors(const uint8_t * input, size_t length) {
     reader.advance();
     c.check_eof();
     if (c.errors()) {
+      if (count != 0) { count--; } // Sometimes the error is only detected in the next chunk
       result res = scalar::utf8::rewind_and_validate_with_errors(reinterpret_cast<const char*>(input), reinterpret_cast<const char*>(input) + count, length - count);
       res.count += count;
       return res;
diff --git a/deps/simdutf/simdutf.h b/deps/simdutf/simdutf.h
index 7a6d3f4d8e0f22..22a49f48c6bc95 100644
--- a/deps/simdutf/simdutf.h
+++ b/deps/simdutf/simdutf.h
@@ -1,4 +1,4 @@
-/* auto-generated on 2023-08-04 13:27:03 -0400. Do not edit! */
+/* auto-generated on 2023-08-11 13:30:54 -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 "3.2.15"
+#define SIMDUTF_VERSION "3.2.17"
 
 namespace simdutf {
 enum {
@@ -591,7 +591,7 @@ enum {
   /**
    * The revision (major.minor.REVISION) of simdutf being used.
    */
-  SIMDUTF_VERSION_REVISION = 15
+  SIMDUTF_VERSION_REVISION = 17
 };
 } // namespace simdutf
 
diff --git a/doc/contributing/maintaining/maintaining-dependencies.md b/doc/contributing/maintaining/maintaining-dependencies.md
index e1d3dab4c9a590..a581fabd3ff70b 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 3.2.15][]
+* [simdutf 3.2.17][]
 * [undici 5.22.1][]
 * [uvwasi 0.0.16][]
 * [V8 11.3.244.8][]
@@ -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 3.2.15
+### simdutf 3.2.17
 
 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 3.2.15]: #simdutf-3215
+[simdutf 3.2.17]: #simdutf-3217
 [undici 5.22.1]: #undici-5221
 [update-openssl-action]: ../../../.github/workflows/update-openssl.yml
 [uvwasi 0.0.16]: #uvwasi-0016