diff --git a/alembic/versions/b54929c22c86_add_portal_specific_config.py b/alembic/versions/b54929c22c86_add_portal_specific_config.py
new file mode 100644
index 00000000..b5d1a420
--- /dev/null
+++ b/alembic/versions/b54929c22c86_add_portal_specific_config.py
@@ -0,0 +1,25 @@
+"""Add portal-specific config
+
+Revision ID: b54929c22c86
+Revises: d5f7b8b4b456
+Create Date: 2018-09-24 23:40:33.528710
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = "b54929c22c86"
+down_revision = "d5f7b8b4b456"
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    op.add_column("portal", sa.Column("config", sa.Text(), nullable=True))
+
+
+def downgrade():
+    with op.batch_alter_table("portal") as batch_op:
+        batch_op.drop_column("config")
diff --git a/example-config.yaml b/example-config.yaml
index 209d57a3..71b91ee0 100644
--- a/example-config.yaml
+++ b/example-config.yaml
@@ -145,7 +145,7 @@ bridge:
         # e.g. if bridge_notices.default is false, notices from other users will not be bridged, but
         #      notices from users listed here will be bridged.
         exceptions:
-        - @importantbot:example.com
+        - "@importantbot:example.com"
     # Whether to bridge Telegram bot messages as m.notices or m.texts.
     bot_messages_as_notices: true
     # Use inline images instead of m.image to make rich captions possible.