diff --git a/backend/alembic/versions/041_add_terminology_oid.py b/backend/alembic/versions/041_add_terminology_oid.py
new file mode 100644
index 0000000..1b4d783
--- /dev/null
+++ b/backend/alembic/versions/041_add_terminology_oid.py
@@ -0,0 +1,33 @@
+"""041_add_terminology_oid
+
+Revision ID: c4c3c36b720d
+Revises: 0fc14c2cfe41
+Create Date: 2025-08-28 16:41:33.977242
+
+"""
+from alembic import op
+import sqlalchemy as sa
+import sqlmodel.sql.sqltypes
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision = 'c4c3c36b720d'
+down_revision = '0fc14c2cfe41'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+
+    op.add_column('terminology', sa.Column('oid', sa.BigInteger(), nullable=True))
+
+    op.execute('update terminology set oid=1 where oid is null')
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('terminology', 'oid')
+    
+    # ### end Alembic commands ###