diff --git a/Musicreater/__init__.py b/Musicreater/__init__.py
index b406933..c3f94c2 100644
--- a/Musicreater/__init__.py
+++ b/Musicreater/__init__.py
@@ -22,7 +22,7 @@ The Licensor of Musicreater("this project") is Eilles, bgArray.
 # 若需转载或借鉴 许可声明请查看仓库目录下的 License.md
 
 
-__version__ = "2.4.2.1"
+__version__ = "2.4.2.2"
 __vername__ = "音符附加信息升级"
 __author__ = (
     ("金羿", "Eilles"),
diff --git a/Musicreater/exceptions.py b/Musicreater/exceptions.py
index 0285a79..22b294d 100644
--- a/Musicreater/exceptions.py
+++ b/Musicreater/exceptions.py
@@ -39,7 +39,7 @@ class MidiFormatException(MSCTBaseException):
 
     def __init__(self, *args):
         """音·创库版本的所有MIDI格式错误均继承于此"""
-        super().__init__("MIDI格式错误", *args)
+        super().__init__("MIDI 格式错误", *args)
 
 
 class MidiDestroyedError(MSCTBaseException):
@@ -47,7 +47,7 @@ class MidiDestroyedError(MSCTBaseException):
 
     def __init__(self, *args):
         """Midi文件损坏"""
-        super().__init__("MIDI文件损坏：无法读取MIDI文件", *args)
+        super().__init__("MIDI文件损坏：无法读取 MIDI 文件", *args)
 
 
 # class MidiUnboundError(MSCTBaseException):
@@ -87,7 +87,7 @@ class NotDefineTempoError(MidiFormatException):
 
     def __init__(self, *args):
         """没有Tempo设定导致时间无法计算的错误"""
-        super().__init__("在曲目开始时没有声明Tempo（未指定拍长）", *args)
+        super().__init__("在曲目开始时没有声明 Tempo（未指定拍长）", *args)
 
 
 class ChannelOverFlowError(MidiFormatException):
diff --git a/Musicreater/plugin/__init__.py b/Musicreater/plugin/__init__.py
index 20d9ed0..c589bde 100644
--- a/Musicreater/plugin/__init__.py
+++ b/Musicreater/plugin/__init__.py
@@ -34,6 +34,7 @@ __all__ = [
     "AXIS_PARTICULAR_VALUE",
     "COMPABILITY_VERSION_117",
     "COMPABILITY_VERSION_119",
+    "COMPABILITY_VERSION_121",
     # BDX 函数
     "bdx_move",
     "form_command_block_in_BDX_bytes",
@@ -62,6 +63,7 @@ from .mcstructure import (
     AXIS_PARTICULAR_VALUE,
     COMPABILITY_VERSION_119,
     COMPABILITY_VERSION_117,
+    COMPABILITY_VERSION_121,
     command_statevalue,
     form_note_block_in_NBT_struct,
     form_repeater_in_NBT_struct,
diff --git a/Musicreater/plugin/mcstructure.py b/Musicreater/plugin/mcstructure.py
index 7d0c098..83feeb3 100644
--- a/Musicreater/plugin/mcstructure.py
+++ b/Musicreater/plugin/mcstructure.py
@@ -58,6 +58,10 @@ COMPABILITY_VERSION_117: int = 17879555
 """
 Minecraft 1.17 兼容版本号
 """
+COMPABILITY_VERSION_121: int = 18168865
+"""
+Minecraft 1.21 兼容版本号
+"""
 
 
 def command_statevalue(axis_: Literal["x", "y", "z", "X", "Y", "Z"], forward_: bool):
@@ -236,7 +240,9 @@ def form_command_block_in_NBT_struct(
                 "SuccessCount": 0,
                 "TickDelay": tickDelay,
                 "TrackOutput": trackOutput,
-                "Version": 25,
+                "Version": (
+                    25 if compability_version_number <= COMPABILITY_VERSION_119 else 43
+                ),
                 "auto": alwaysRun,
                 "conditionMet": False,  # 是否已经满足条件
                 "conditionalMode": condition,