diff --git a/stix2validator/schemas-2.1 b/stix2validator/schemas-2.1
index 9d86da9..818be8a 160000
--- a/stix2validator/schemas-2.1
+++ b/stix2validator/schemas-2.1
@@ -1 +1 @@
-Subproject commit 9d86da9b3a5c5416fa4fbd92c76d891662a77401
+Subproject commit 818be8a25a635ea696c115bdf7126e300a606717
diff --git a/stix2validator/test/v21/network_traffic_tests.py b/stix2validator/test/v21/network_traffic_tests.py
index 669a71d..2a611b5 100644
--- a/stix2validator/test/v21/network_traffic_tests.py
+++ b/stix2validator/test/v21/network_traffic_tests.py
@@ -82,9 +82,9 @@ def test_network_traffic_http_request_header(self):
                 "request_value": "/download.html",
                 "request_version": "http/1.1",
                 "request_header": {
-                    "Accept-Encoding": "gzip,deflate",
-                    "Host": "www.example.com",
-                    "x-foobar": "something"
+                    "Accept-Encoding": ["gzip,deflate"],
+                    "Host": ["www.example.com"],
+                    "x-foobar": ["something"]
                 }
             }
         }