diff --git a/kallithea/model/db.py b/kallithea/model/db.py
--- a/kallithea/model/db.py
+++ b/kallithea/model/db.py
@@ -968,8 +968,8 @@ class Repository(Base, BaseModel):
     enable_statistics = Column("statistics", Boolean(), nullable=True, unique=None, default=True)
     enable_downloads = Column("downloads", Boolean(), nullable=True, unique=None, default=True)
     description = Column(String(10000, convert_unicode=False), nullable=True, unique=None, default=None)
-    created_on = Column(DateTime(timezone=False), nullable=True, unique=None, default=datetime.datetime.now)
-    updated_on = Column(DateTime(timezone=False), nullable=True, unique=None, default=datetime.datetime.now)
+    created_on = Column(DateTime(timezone=False), nullable=False, unique=None, default=datetime.datetime.now)
+    updated_on = Column(DateTime(timezone=False), nullable=False, unique=None, default=datetime.datetime.now)
     _landing_revision = Column("landing_revision", String(255, convert_unicode=False), nullable=False, unique=False, default=None)
     enable_locking = Column(Boolean(), nullable=False, unique=None, default=False)
     _locked = Column("locked", String(255, convert_unicode=False), nullable=True, unique=False, default=None)