diff --git a/spoolman/database/models.py b/spoolman/database/models.py
index f78bfa5..05e4f4c 100644
--- a/spoolman/database/models.py
+++ b/spoolman/database/models.py
@@ -5,7 +5,6 @@ from typing import Optional
 
 from sqlalchemy import ForeignKey, Integer, String
 from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column, relationship
-from sqlalchemy.sql import func
 
 
 class Base(DeclarativeBase):
@@ -16,7 +15,7 @@ class Vendor(Base):
     __tablename__ = "vendor"
 
     id: Mapped[int] = mapped_column(Integer, primary_key=True, index=True)
-    registered: Mapped[datetime] = mapped_column(default=func.now())
+    registered: Mapped[datetime] = mapped_column()
     name: Mapped[str] = mapped_column(String(64))
     comment: Mapped[Optional[str]] = mapped_column(String(1024))
     filaments: Mapped[list["Filament"]] = relationship(back_populates="vendor")
@@ -26,7 +25,7 @@ class Filament(Base):
     __tablename__ = "filament"
 
     id: Mapped[int] = mapped_column(primary_key=True, index=True)
-    registered: Mapped[datetime] = mapped_column(default=func.now())
+    registered: Mapped[datetime] = mapped_column()
     name: Mapped[Optional[str]] = mapped_column(String(64))
     vendor_id: Mapped[Optional[int]] = mapped_column(ForeignKey("vendor.id"))
     vendor: Mapped[Optional["Vendor"]] = relationship(back_populates="filaments")
@@ -48,7 +47,7 @@ class Spool(Base):
     __tablename__ = "spool"
 
     id: Mapped[int] = mapped_column(primary_key=True, index=True)
-    registered: Mapped[datetime] = mapped_column(default=func.now())
+    registered: Mapped[datetime] = mapped_column()
     first_used: Mapped[Optional[datetime]] = mapped_column()
     last_used: Mapped[Optional[datetime]] = mapped_column()
     filament_id: Mapped[int] = mapped_column(ForeignKey("filament.id"))