diff --git a/README.md b/README.md
index e5e35d60..f7854ecf 100644
--- a/README.md
+++ b/README.md
@@ -566,7 +566,7 @@ 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.
+1. May., 2025:     FMSoft released MiniGUI version 5.0.16.
 
 ## AUTHORS AND COPYING
 
diff --git a/RELEASE-NOTES.md b/RELEASE-NOTES.md
index ed828766..b0bf4306 100644
--- a/RELEASE-NOTES.md
+++ b/RELEASE-NOTES.md
@@ -1,5 +1,7 @@
 # Release Notes
 
+- [Version 5.0.16](#version-5016)
+   + [What's new in version 5.0.16](#whats-new-in-version-5016)
 - [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)
@@ -34,6 +36,15 @@
    + [Changes leading to incompatibility](#changes-leading-to-incompatibility)
    + [Deprecated APIs](#deprecated-apis)
 
+## Version 5.0.16
+
+On May 27, 2025, FMSoft announces the availability of MiniGUI 5.0.16,
+which is a bugfix release with some minor enhancements of MiniGUI 5.0.x.
+
+* BUGFIXING:
+   - The desktop thread can not handle the request from other threads as soon as possible.
+   - The `MSG_TIMEOUT` message can not be fired correctly under MiniGUI-Threads mode.
+
 ## Version 5.0.15
 
 On May 09, 2025, FMSoft announces the availability of MiniGUI 5.0.15,
diff --git a/Version.md b/Version.md
index 600f4332..8b5932ef 100644
--- a/Version.md
+++ b/Version.md
@@ -1,4 +1,4 @@
-Version 5.0.15 (2025/05/09)
+Version 5.0.16 (2025/05/27)
 
 This is a minor enhancement and bugfix release of MiniGUI 5.0.x, the stable version.
 
diff --git a/configure.ac b/configure.ac
index 662b91d4..69891c52 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, 5.0.15)
+AC_INIT(libminigui, 5.0.16)
 AC_CONFIG_SRCDIR(src/main/main.c)
 
 dnl Set various version strings - taken gratefully from the SDL sources
@@ -16,9 +16,9 @@ dnl Set various version strings - taken gratefully from the SDL sources
 #
 MINIGUI_MAJOR_VERSION=5
 MINIGUI_MINOR_VERSION=0
-MINIGUI_MICRO_VERSION=15
-MINIGUI_INTERFACE_AGE=0
-MINIGUI_BINARY_AGE=0
+MINIGUI_MICRO_VERSION=16
+MINIGUI_INTERFACE_AGE=1
+MINIGUI_BINARY_AGE=1
 MINIGUI_VERSION=$MINIGUI_MAJOR_VERSION.$MINIGUI_MINOR_VERSION.$MINIGUI_MICRO_VERSION
 
 AC_SUBST(MINIGUI_MAJOR_VERSION)