diff --git a/CHANGELOG.md b/CHANGELOG.md
index e8d8db5a1e..27ca94a200 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,8 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
 ## [0.4.0] - 2023-09-04
 
 #### Added
diff --git a/CMakeLists.txt b/CMakeLists.txt
index cdac47ba9d..2100d24929 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,7 +11,7 @@ project(libsecp256k1
   # The package (a.k.a. release) version is based on semantic versioning 2.0.0 of
   # the API. All changes in experimental modules are treated as
   # backwards-compatible and therefore at most increase the minor version.
-  VERSION 0.4.0
+  VERSION 0.4.1
   DESCRIPTION "Optimized C library for ECDSA signatures and secret/public key operations on curve secp256k1."
   HOMEPAGE_URL "https://github.com/bitcoin-core/secp256k1"
   LANGUAGES C
@@ -35,7 +35,7 @@ endif()
 # All changes in experimental modules are treated as if they don't affect the
 # interface and therefore only increase the revision.
 set(${PROJECT_NAME}_LIB_VERSION_CURRENT 3)
-set(${PROJECT_NAME}_LIB_VERSION_REVISION 0)
+set(${PROJECT_NAME}_LIB_VERSION_REVISION 1)
 set(${PROJECT_NAME}_LIB_VERSION_AGE 1)
 
 set(CMAKE_C_STANDARD 90)
diff --git a/configure.ac b/configure.ac
index e3877850d3..e82ac75fab 100644
--- a/configure.ac
+++ b/configure.ac
@@ -5,8 +5,8 @@ AC_PREREQ([2.60])
 # backwards-compatible and therefore at most increase the minor version.
 define(_PKG_VERSION_MAJOR, 0)
 define(_PKG_VERSION_MINOR, 4)
-define(_PKG_VERSION_PATCH, 0)
-define(_PKG_VERSION_IS_RELEASE, true)
+define(_PKG_VERSION_PATCH, 1)
+define(_PKG_VERSION_IS_RELEASE, false)
 
 # The library version is based on libtool versioning of the ABI. The set of
 # rules for updating the version can be found here:
@@ -14,7 +14,7 @@ define(_PKG_VERSION_IS_RELEASE, true)
 # All changes in experimental modules are treated as if they don't affect the
 # interface and therefore only increase the revision.
 define(_LIB_VERSION_CURRENT, 3)
-define(_LIB_VERSION_REVISION, 0)
+define(_LIB_VERSION_REVISION, 1)
 define(_LIB_VERSION_AGE, 1)
 
 AC_INIT([libsecp256k1],m4_join([.], _PKG_VERSION_MAJOR, _PKG_VERSION_MINOR, _PKG_VERSION_PATCH)m4_if(_PKG_VERSION_IS_RELEASE, [true], [], [-dev]),[https://github.com/bitcoin-core/secp256k1/issues],[libsecp256k1],[https://github.com/bitcoin-core/secp256k1])