diff --git a/src/clients/vitacore/schema.py b/src/clients/vitacore/schema.py
index b4bed20..5e4da8d 100644
--- a/src/clients/vitacore/schema.py
+++ b/src/clients/vitacore/schema.py
@@ -591,8 +591,8 @@ class PatientELNModel(BaseModel):
     DateClose: datetime | None = Field(
         title='Дата закрытия', examples=['2020-10-25'], default=None
     )
-    WorkDate: datetime = Field(
-        title='Дата выхода на работу', examples=['2020-10-26']
+    WorkDate: datetime | None = Field(
+        title='Дата выхода на работу', examples=['2020-10-26'], default=None
     )
     DaysCount: int = Field(
         title='Количество дней нетрудоспособности', examples=[5]