diff --git a/include/rtdef.h b/include/rtdef.h
index 111ac4a12c..d125c970c9 100644
--- a/include/rtdef.h
+++ b/include/rtdef.h
@@ -34,6 +34,7 @@
  * 2019-12-20     Bernard      change version number to v4.0.3
  * 2020-08-10     Meco Man     add macro for struct rt_device_ops
  * 2020-10-23     Meco Man     define maximum value of ipc type
+ * 2021-05-10     armink       change version number to v4.0.4
  */
 
 #ifndef __RT_DEF_H__
@@ -55,7 +56,7 @@ extern "C" {
 /* RT-Thread version information */
 #define RT_VERSION                      4L              /**< major version number */
 #define RT_SUBVERSION                   0L              /**< minor version number */
-#define RT_REVISION                     3L              /**< revise version number */
+#define RT_REVISION                     4L              /**< revise version number */
 
 /* RT-Thread version */
 #define RTTHREAD_VERSION                ((RT_VERSION * 10000) + \
diff --git a/src/Kconfig b/src/Kconfig
index 6afb719395..9a49146dff 100644
--- a/src/Kconfig
+++ b/src/Kconfig
@@ -353,7 +353,7 @@ endmenu
 
 config RT_VER_NUM
     hex
-    default 0x40003
+    default 0x40004
     help
         RT-Thread version number