diff --git a/backend/app/schemas/admin.py b/backend/app/schemas/admin.py
index fb995d26..72c63d43 100644
--- a/backend/app/schemas/admin.py
+++ b/backend/app/schemas/admin.py
@@ -126,7 +126,7 @@ class AdminAccountDetailResponse(AdminAccountListItem):
 class AdminAccountCreate(BaseModel):
     name: str = Field(..., min_length=1, max_length=255)
     plan: Literal["free", "pro", "team"] = "free"
-    owner_email: Optional[str] = Field(None, description="Email of an existing user to set as owner")
+    owner_email: Optional[EmailStr] = Field(None, description="Email of an existing user to set as owner")
 
 
 class AdminAccountUpdate(BaseModel):