diff --git a/src/masterdata/schema.py b/src/masterdata/schema.py
index ac322ef..4def6a0 100644
--- a/src/masterdata/schema.py
+++ b/src/masterdata/schema.py
@@ -15,7 +15,7 @@ class MasterdataBase(DefaultBase):
     description: Optional[str] = Field(None, nullable=True)
     unit_of_measurement: Optional[str] = Field(None, nullable=True)
     value_num: Optional[float] = Field(
-        None, nullable=True, ge=0, le=1_000_000_000_000_000  # 1 quadrillion
+        None, nullable=True, le=1_000_000_000_000_000  # 1 quadrillion
     )
     value_str: Optional[str] = Field(None, nullable=True)
     created_at: Optional[datetime] = Field(None, nullable=True)
@@ -29,7 +29,7 @@ class MasterDataCreate(MasterdataBase):
     description: str = Field(..., nullable=True)
     unit_of_measurement: str = Field(..., nullable=True)
     value_num: float = Field(
-        ..., nullable=True, ge=0, le=1_000_000_000_000_000  # 1 quadrillion
+        ..., nullable=True, le=1_000_000_000_000_000  # 1 quadrillion
     )
     value_str: str = Field(..., nullable=True)