diff --git a/alembic/versions/034_add_confirm_generation_fields.py b/alembic/versions/034_add_confirm_generation_fields.py
index 177a33529..3782fabdb 100644
--- a/alembic/versions/034_add_confirm_generation_fields.py
+++ b/alembic/versions/034_add_confirm_generation_fields.py
@@ -21,7 +21,7 @@ depends_on = None
 def upgrade() -> None:
     op.add_column(
         "generation_tasks",
-        sa.Column("is_preview", sa.Boolean(), nullable=False, server_default=sa.text("1")),
+        sa.Column("is_preview", sa.Boolean(), nullable=False, server_default=sa.true()),
     )
     op.add_column(
         "generation_tasks",