diff --git a/src/FilterLists.Data/Entities/BaseEntity.cs b/src/FilterLists.Data/Entities/BaseEntity.cs
index 5bfe60d79..c7bfba6e6 100644
--- a/src/FilterLists.Data/Entities/BaseEntity.cs
+++ b/src/FilterLists.Data/Entities/BaseEntity.cs
@@ -6,6 +6,6 @@ public abstract class BaseEntity
     {
         public int Id { get; set; }
         public DateTime CreatedDateUtc { get; set; }
-        public DateTime? ModifiedDateUtc { get; set; }
+        public DateTime ModifiedDateUtc { get; set; }
     }
 }
\ No newline at end of file
diff --git a/src/FilterLists.Data/EntityTypeConfigurations/BaseEntityConfiguration.cs b/src/FilterLists.Data/EntityTypeConfigurations/BaseEntityConfiguration.cs
index 48c778b7f..d15e70988 100644
--- a/src/FilterLists.Data/EntityTypeConfigurations/BaseEntityConfiguration.cs
+++ b/src/FilterLists.Data/EntityTypeConfigurations/BaseEntityConfiguration.cs
@@ -16,7 +16,7 @@ public virtual void Configure(EntityTypeBuilder<TBase> entityTypeBuilder)
             entityTypeBuilder.Property(b => b.ModifiedDateUtc)
                 .HasColumnType("TIMESTAMP")
                 .HasDefaultValueSql("CURRENT_TIMESTAMP")
-                .ValueGeneratedOnUpdate();
+                .ValueGeneratedOnAddOrUpdate();
         }
     }
 }
\ No newline at end of file