diff --git a/CMakeLists.txt b/CMakeLists.txt
index b00c14d5c..496116807 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,7 +3,7 @@ cmake_minimum_required(VERSION 3.14)
 project(
     simdjson
     # The version number is modified by tools/release.py
-    VERSION 4.0.0
+    VERSION 4.0.1
     DESCRIPTION "Parsing gigabytes of JSON per second"
     HOMEPAGE_URL "https://simdjson.org/"
     LANGUAGES CXX C
diff --git a/Doxyfile b/Doxyfile
index 676ca1015..f071e00b6 100644
--- a/Doxyfile
+++ b/Doxyfile
@@ -38,7 +38,7 @@ PROJECT_NAME           = simdjson
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = "4.0.0"
+PROJECT_NUMBER         = "4.0.1"
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a
diff --git a/include/simdjson/simdjson_version.h b/include/simdjson/simdjson_version.h
index add79802f..900cc482d 100644
--- a/include/simdjson/simdjson_version.h
+++ b/include/simdjson/simdjson_version.h
@@ -4,7 +4,7 @@
 #define SIMDJSON_SIMDJSON_VERSION_H
 
 /** The version of simdjson being used (major.minor.revision) */
-#define SIMDJSON_VERSION "4.0.0"
+#define SIMDJSON_VERSION "4.0.1"
 
 namespace simdjson {
 enum {
@@ -19,7 +19,7 @@ enum {
   /**
    * The revision (major.minor.REVISION) of simdjson being used.
    */
-  SIMDJSON_VERSION_REVISION = 0
+  SIMDJSON_VERSION_REVISION = 1
 };
 } // namespace simdjson
 
diff --git a/singleheader/simdjson.cpp b/singleheader/simdjson.cpp
index a783697b8..4e51509bb 100644
--- a/singleheader/simdjson.cpp
+++ b/singleheader/simdjson.cpp
@@ -1,4 +1,4 @@
-/* auto-generated on 2025-09-09 18:44:21 -0400. version 4.0.0 Do not edit! */
+/* auto-generated on 2025-09-12 19:26:22 -0400. version 4.0.1 Do not edit! */
 /* including simdjson.cpp:  */
 /* begin file simdjson.cpp */
 #define SIMDJSON_SRC_SIMDJSON_CPP
diff --git a/singleheader/simdjson.h b/singleheader/simdjson.h
index 477a0f718..16a24068d 100644
--- a/singleheader/simdjson.h
+++ b/singleheader/simdjson.h
@@ -1,4 +1,4 @@
-/* auto-generated on 2025-09-09 18:44:21 -0400. version 4.0.0 Do not edit! */
+/* auto-generated on 2025-09-12 19:26:22 -0400. version 4.0.1 Do not edit! */
 /* including simdjson.h:  */
 /* begin file simdjson.h */
 #ifndef SIMDJSON_H
@@ -2508,7 +2508,7 @@ namespace std {
 #define SIMDJSON_SIMDJSON_VERSION_H
 
 /** The version of simdjson being used (major.minor.revision) */
-#define SIMDJSON_VERSION "4.0.0"
+#define SIMDJSON_VERSION "4.0.1"
 
 namespace simdjson {
 enum {
@@ -2523,7 +2523,7 @@ enum {
   /**
    * The revision (major.minor.REVISION) of simdjson being used.
    */
-  SIMDJSON_VERSION_REVISION = 0
+  SIMDJSON_VERSION_REVISION = 1
 };
 } // namespace simdjson
 
diff --git a/singleheader/singleheader.zip b/singleheader/singleheader.zip
index eea250cfc..6acc67467 100644
Binary files a/singleheader/singleheader.zip and b/singleheader/singleheader.zip differ