diff --git a/xos/synchronizer/migrations/0004_auto_20190409_1839.py b/xos/synchronizer/migrations/0004_auto_20190409_1839.py
new file mode 100644
index 0000000..05ffb7d
--- /dev/null
+++ b/xos/synchronizer/migrations/0004_auto_20190409_1839.py
@@ -0,0 +1,34 @@
+# Copyright 2017-present Open Networking Foundation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.20 on 2019-04-09 22:39
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('fabric-crossconnect', '0003_auto_20190312_1841'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='bngportmapping_decl',
+            name='s_tag',
+            field=models.CharField(help_text=b"Single s-tag, range of s-tags, or 'ANY'", max_length=1024, unique=True),
+        ),
+    ]
diff --git a/xos/synchronizer/models/fabric-crossconnect.xproto b/xos/synchronizer/models/fabric-crossconnect.xproto
index d908092..0d8fc45 100644
--- a/xos/synchronizer/models/fabric-crossconnect.xproto
+++ b/xos/synchronizer/models/fabric-crossconnect.xproto
@@ -25,6 +25,7 @@
 message BNGPortMapping (XOSBase) {
     required string s_tag = 1 [
         help_text = "Single s-tag, range of s-tags, or 'ANY'",
+        max_length = 1024,
         tosca_key = True,
         unique = True];
     required int32 switch_port = 2 [