diff --git a/README.md b/README.md
index 308fa46b..e5e35d60 100644
--- a/README.md
+++ b/README.md
@@ -460,7 +460,7 @@ for examples:
 
 ## HISTORY
 
-21 years have pasted since MiniGUI was initially created at
+27 years have pasted since MiniGUI was initially created at
 the end of 1998, and now it becomes much reliable and stable.
 During the past years, many remarkable changes have taken place in
 the MiniGUI project.
@@ -566,13 +566,14 @@ A brief history description of the development progress is listed as follow:
 1. Jan., 2022:     FMSoft released MiniGUI version 5.0.9.
 1. Sep., 2022:     FMSoft released MiniGUI version 5.0.10.
 1. Aug., 2023:     FMSoft released MiniGUI version 5.0.13.
+1. May., 2025:     FMSoft released MiniGUI version 5.0.15.
 
 ## AUTHORS AND COPYING
 
 The original author of MiniGUI is Vincent Wei, and now MiniGUI is maintained by FMSoft.
 For more information, please refer to <http://www.fmsoft.cn>.
 
-Copyright (C) 2002 ~ 2023, Beijing FMSoft Technologies Co., Ltd.  
+Copyright (C) 2002 ~ 2025, Beijing FMSoft Technologies Co., Ltd.  
 Copyright (C) 1998 ~ 2002, Vincent Wei
 
 This program is free software: you can redistribute it and/or modify
diff --git a/RELEASE-NOTES.md b/RELEASE-NOTES.md
index e12937fc..ed828766 100644
--- a/RELEASE-NOTES.md
+++ b/RELEASE-NOTES.md
@@ -1,7 +1,7 @@
 # Release Notes
 
-- [Version 5.2.0](#version-520)
-   + [What's new in version 5.2.0](#whats-new-in-version-520)
+- [Version 5.0.15](#version-5015)
+   + [What's new in version 5.0.15](#whats-new-in-version-5015)
 - [Version 5.0.13](#version-5013)
    + [What's new in version 5.0.13](#whats-new-in-version-5013)
 - [Version 5.0.12](#version-5012)
@@ -34,10 +34,11 @@
    + [Changes leading to incompatibility](#changes-leading-to-incompatibility)
    + [Deprecated APIs](#deprecated-apis)
 
-## Version 5.2.0
+## Version 5.0.15
 
-On Nov. 30, 2023, FMSoft announces the availability of MiniGUI 5.2.0,
-which is an mainline release with some major enhancements:
+On May 09, 2025, FMSoft announces the availability of MiniGUI 5.0.15,
+which is an enhancement release with some minor enhancements
+of MiniGUI 5.0.x.
 
 * ENHANCEMENTS:
    - Optimize NEWGAL engines: `shadow`, `drm`, and `fbcon` for large resolution.
diff --git a/Version.md b/Version.md
index a8482d39..600f4332 100644
--- a/Version.md
+++ b/Version.md
@@ -1,6 +1,6 @@
-Version 5.2.0 (2023/09/30)
+Version 5.0.15 (2025/05/09)
 
-This is a minor enhancement and bugfix release of MiniGUI 5.2.x, the stable version.
+This is a minor enhancement and bugfix release of MiniGUI 5.0.x, the stable version.
 
 Other packages for MiniGUI resource, tools, components, and samples:
 
diff --git a/configure.ac b/configure.ac
index 0f879afd..662b91d4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,6 +1,6 @@
 dnl Process this file with autoconf to produce a configure script.
 AC_PREREQ(2.60)
-AC_INIT(libminigui, 5.2.0)
+AC_INIT(libminigui, 5.0.15)
 AC_CONFIG_SRCDIR(src/main/main.c)
 
 dnl Set various version strings - taken gratefully from the SDL sources
@@ -15,8 +15,8 @@ dnl Set various version strings - taken gratefully from the SDL sources
 # set MINIGUI_BINARY_AGE and MINIGUI_INTERFACE_AGE to 0.
 #
 MINIGUI_MAJOR_VERSION=5
-MINIGUI_MINOR_VERSION=2
-MINIGUI_MICRO_VERSION=0
+MINIGUI_MINOR_VERSION=0
+MINIGUI_MICRO_VERSION=15
 MINIGUI_INTERFACE_AGE=0
 MINIGUI_BINARY_AGE=0
 MINIGUI_VERSION=$MINIGUI_MAJOR_VERSION.$MINIGUI_MINOR_VERSION.$MINIGUI_MICRO_VERSION