diff --git a/pyproject.toml b/pyproject.toml
index ffaa3e7..8661221 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "rcs-pydantic"
-version = "0.2.0"
+version = "0.2.1"
 description = ""
 authors = ["xncbf <xncbf12@gmail.com>"]
 keywords = ["pydantic", "rcs", "fastapi"]
diff --git a/rcs_pydantic/scheme.py b/rcs_pydantic/scheme.py
index ef00e44..201e737 100644
--- a/rcs_pydantic/scheme.py
+++ b/rcs_pydantic/scheme.py
@@ -2,6 +2,7 @@
 from typing import Dict, List, Optional, Union
 
 from pydantic import BaseModel, Field, validator
+from pydantic.error_wrappers import ValidationError
 
 from . import enums
 from .errors import ErrorCodeEnum, LegacyErrorCodeEnum
@@ -501,7 +502,7 @@ class MessageInfo(BaseModel):
     postBackId: Optional[str] = Field(max_length=40)
     postBackData: Optional[str] = Field(max_length=2048)
     displayText: Optional[str] = Field(max_length=200)
-    messageBody: Union[TextMessageInfo, UserLocationInfo, FileMessageInfo, None]
+    messageBody: Optional[str]
     """
     eventType이message인 경우에만 설정
     - 텍스트 메시지의 경우 샘플
@@ -535,7 +536,13 @@ class MessageInfo(BaseModel):
     def check_message_body(cls, v, values, **kwargs):
         if v:
             if values["eventType"] == enums.EventTypeEnum.MESSAGE:
-                return json.loads(v)
+                v = json.loads(v)
+                for basemodel in [TextMessageInfo, UserLocationInfo, FileMessageInfo]:
+                    try:
+                        return basemodel(**v)
+                    except ValidationError:
+                        pass
+                raise ValueError("Invalid messageBody")
             raise ValueError("messageBody is not allowed")
 
     userContact: str = Field(max_length=40)