diff --git a/alembic/versions/20250414_144046_ebe9468d_update_fruit.py b/alembic/versions/20250414_144046_ebe9468d_update_fruit.py
index 42973df..c9ac9a6 100644
--- a/alembic/versions/20250414_144046_ebe9468d_update_fruit.py
+++ b/alembic/versions/20250414_144046_ebe9468d_update_fruit.py
@@ -13,7 +13,17 @@ branch_labels = None
 depends_on = None
 
 def upgrade():
-    op.add_column('fruits', sa.Column('shape', sa.String(), nullable=False))
+    # SQLite doesn't support adding NOT NULL columns without defaults
+    # We need to use batch operations for this
+    with op.batch_alter_table('fruits') as batch_op:
+        batch_op.add_column(sa.Column('shape', sa.String(), nullable=True))
+        # Update existing rows with a default value
+        op.execute("UPDATE fruits SET shape = 'unknown' WHERE shape IS NULL")
+        # Now make the column NOT NULL
+        batch_op.alter_column('shape',
+                            existing_type=sa.String(),
+                            nullable=False)
 
 def downgrade():
-    op.drop_column('fruits', 'shape')
\ No newline at end of file
+    with op.batch_alter_table('fruits') as batch_op:
+        batch_op.drop_column('shape')
\ No newline at end of file