diff --git a/ChangeLog b/ChangeLog
index 4e5024f..1db0bd4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2019-04-24  NIIBE Yutaka  <gniibe@fsij.org>
+
+	* mcu/sys-stm32l4.c: New.
+	* mcu/chx-stm32l4.c: New.  Not support suspend yet.
+	* mcu/stm32l.h: New.
+	* mcu/clk_gpio_init-stm32l.c: New.
+
 2019-04-17  NIIBE Yutaka  <gniibe@fsij.org>
 
 	* mcu/usb-stm32l4.c: New.
@@ -5,6 +12,7 @@
 
 2019-04-12  NIIBE Yutaka  <gniibe@fsij.org>
 
+	* contrib/usart-stm32l4.c: New.
 	* contrib/usart-common.c: Factor out from usart-stm32f103.c.
 
 	* entry.c [__ARM_ARCH_7EM__] (entry): Fix for Cortex-M4.
diff --git a/NEWS b/NEWS
index 2a34557..f0eaadd 100644
--- a/NEWS
+++ b/NEWS
@@ -1,6 +1,21 @@
 NEWS - Noteworthy changes
 
 
+* Major changes in Chopstx 2.0
+
+  Released 2019-0X-XX
+
+** Cortex-M4 support
+Cortex-M4 support has been added.  Not supporting use of FPU or DSP,
+yet.  Note that it's not intend to be used by Gnuk.
+
+** STM32L432 support
+USART and USB drivers are added.
+
+** New board support: ST Nucleo-32 L432
+ST Nucleo-32 L432 is a small board with ST-Link/V2-1.
+
+
 * Major changes in Chopstx 1.14
 
   Released 2019-03-02
diff --git a/README b/README
index 5663ebf..af873a2 100644
--- a/README
+++ b/README
@@ -1,6 +1,6 @@
 Chopstx - Threads and only Threads
-							Version 1.14
-							  2018-03-02
+							 Version 2.0
+							  2018-0X-XX
 							Niibe Yutaka
 					     Flying Stone Technology
 
@@ -8,8 +8,8 @@ What's Chopstx?
 ===============
 
 Chopstx is an RT thread library for STM32F103 and GD32F103 (ARM
-Cortex-M3), STM32F030 (ARM Cortex-M0), MKL27Z (ARM Cortex-M0plus), and
-emulation on GNU/Linux.
+Cortex-M3), STM32F030 (ARM Cortex-M0), MKL27Z (ARM Cortex-M0plus),
+STM32L432 (ARM Cortex-M4), and emulation on GNU/Linux.
 
 While most RTOSes come with many features, drivers, and protocol
 stacks, Chopstx just offers a simple RT thread library.
@@ -19,7 +19,7 @@ enables coherent code for ease of maintenance.
 
 While threads are important, we don't need more threads than
 necessary.  Chopstx provides a feature of poll, so that we can
-minimize use of threads.
+handle multiple events by a single thread.
 
 
 Note that this library is _not_ related to the hand game:
diff --git a/doc/chopstx.texi b/doc/chopstx.texi
index e8df4b8..614681f 100644
--- a/doc/chopstx.texi
+++ b/doc/chopstx.texi
@@ -101,7 +101,7 @@ enables coherent code for ease of maintenance.
 
 While threads are important, we don't need more threads than
 necessary.  Chopstx provides a feature of poll, so that we can
-minimize use of threads.
+handle multiple events by a single thread.
 
 
 @node Threads and only Threads