diff --git a/alembic/versions/6512aa8d4641_default_boolean_fields_to_false.py b/alembic/versions/6512aa8d4641_default_boolean_fields_to_false.py
index f529a5be..180ef5d5 100644
--- a/alembic/versions/6512aa8d4641_default_boolean_fields_to_false.py
+++ b/alembic/versions/6512aa8d4641_default_boolean_fields_to_false.py
@@ -23,7 +23,7 @@ def upgrade():
     op.alter_column('task_orders', 'unlimited_level_of_warrant', type_=sa.Boolean(), server_default=False)
 
 def downgrade():
-    op.alter_column('task_orders', 'cor_invite', server_default=sa.Boolean())
-    op.alter_column('task_orders', 'ko_invite', server_default=sa.Boolean())
-    op.alter_column('task_orders', 'so_invite', server_default=sa.Boolean())
-    op.alter_column('task_orders', 'unlimited_level_of_warrant', server_default=sa.Boolean())
+    op.alter_column('task_orders', 'cor_invite', type_=sa.Boolean(), server_default=None)
+    op.alter_column('task_orders', 'ko_invite', type_=sa.Boolean(), server_default=None)
+    op.alter_column('task_orders', 'so_invite', type_=sa.Boolean(), server_default=None)
+    op.alter_column('task_orders', 'unlimited_level_of_warrant', type_=sa.Boolean(), server_default=None)