diff --git a/alembic/versions/15ba9c27ee8a_add_nullable_transaction_position_field_.py b/alembic/versions/15ba9c27ee8a_add_nullable_transaction_position_field_.py
new file mode 100644
index 0000000..a830666
--- /dev/null
+++ b/alembic/versions/15ba9c27ee8a_add_nullable_transaction_position_field_.py
@@ -0,0 +1,29 @@
+"""Add nullable transaction_position field to swaps and traces
+
+Revision ID: 15ba9c27ee8a
+Revises: 04b76ab1d2af
+Create Date: 2021-12-02 18:24:18.218880
+
+"""
+import sqlalchemy as sa
+from alembic import op
+
+
+# revision identifiers, used by Alembic.
+revision = "15ba9c27ee8a"
+down_revision = "04b76ab1d2af"
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    op.add_column(
+        "classified_traces",
+        sa.Column("transaction_position", sa.Numeric, nullable=True),
+    )
+    op.add_column("swaps", sa.Column("transaction_position", sa.Numeric, nullable=True))
+
+
+def downgrade():
+    op.drop_column("classified_traces", "transaction_position")
+    op.drop_column("swaps", "transaction_position")