diff --git a/Library/Include/arm_2d.h b/Library/Include/arm_2d.h
index f327c74e..28f0ac26 100644
--- a/Library/Include/arm_2d.h
+++ b/Library/Include/arm_2d.h
@@ -86,8 +86,8 @@ extern "C" {
 /*  arm-2d version */
 #define ARM_2D_VERSION_MAJOR        1                                           //!< Major version
 #define ARM_2D_VERSION_MINOR        2                                           //!< Minor version
-#define ARM_2D_VERSION_PATCH        1                                           //!< Patch number
-#define ARM_2D_VERSION_STR          ""                                          //!< tag
+#define ARM_2D_VERSION_PATCH        2                                           //!< Patch number
+#define ARM_2D_VERSION_STR          "dev"                                       //!< tag
 
 /*!
  * \brief arm-2d version number in decimal
diff --git a/README.md b/README.md
index 248a99a2..7926c12e 100644
--- a/README.md
+++ b/README.md
@@ -80,7 +80,7 @@ Potential users of Arm-2D may have different backgrounds and purposes. Whether y
 - [How to Get Started](#how-to-get-started)
 - [Table of Content](#table-of-content)
 - [Features](#features)
-  - [In this version (v1.2.1-dev)](#in-this-version-v121-dev)
+  - [In this version (v1.2.2-dev)](#in-this-version-v122-dev)
   - [New Features Planned in the Future](#new-features-planned-in-the-future)
 - [1 Introduction](#1-introduction)
   - [1.1 The Background](#11-the-background)
@@ -100,7 +100,7 @@ Potential users of Arm-2D may have different backgrounds and purposes. Whether y
 
 ## Features
 
-### In this version (v1.2.1)
+### In this version (v1.2.2-dev)
 
 The Arm-2D library provides **Low-Level 2D Image Processing Services** mainly used in **Deep Embedded Display system**. The supported features include but not limited to:
 
@@ -413,4 +413,4 @@ Thank you for your time.
 
 ***Arm-2D Development Team.***
 
-20 Dec 2024
+23 Dec 2024