diff --git a/backend/src/schemas/todo.py b/backend/src/schemas/todo.py
index 3033fa2..01339cc 100644
--- a/backend/src/schemas/todo.py
+++ b/backend/src/schemas/todo.py
@@ -48,7 +48,7 @@ class TodoItemSchedule(BaseModel):
 class TodoItemUpdate(BaseModel):
     """할일 수정"""
     content: Optional[str] = Field(None, min_length=1, max_length=2000)
-    status: Optional[str] = Field(None, regex="^(draft|scheduled|active|completed|delayed)$")
+    status: Optional[str] = Field(None, pattern="^(draft|scheduled|active|completed|delayed)$")
     start_date: Optional[datetime] = None
     estimated_minutes: Optional[int] = Field(None, ge=1, le=120)
     delayed_until: Optional[datetime] = None