diff --git a/specification/communication/data-plane/Microsoft.CommunicationServicesTurn/preview/2021-02-22-preview1/CommunicationTurn.json b/specification/communication/data-plane/Microsoft.CommunicationServicesTurn/preview/2021-02-22-preview1/CommunicationTurn.json
index 35affa23fbdd..d9dba569baa5 100644
--- a/specification/communication/data-plane/Microsoft.CommunicationServicesTurn/preview/2021-02-22-preview1/CommunicationTurn.json
+++ b/specification/communication/data-plane/Microsoft.CommunicationServicesTurn/preview/2021-02-22-preview1/CommunicationTurn.json
@@ -61,8 +61,11 @@
       "type": "object",
       "properties": {
         "urls": {
-          "description": "URL of the server.",
-          "type": "string"
+          "description": "List of TURN server URLs.",
+          "type": "array",
+          "items": {
+            "type": "string"
+          }
         },
         "username": {
           "description": "User account name which uniquely identifies the credentials.",
diff --git a/specification/communication/data-plane/Microsoft.CommunicationServicesTurn/preview/2021-02-22-preview1/examples/IssueTurnCredentials.json b/specification/communication/data-plane/Microsoft.CommunicationServicesTurn/preview/2021-02-22-preview1/examples/IssueTurnCredentials.json
index 97c1b3d68e95..8c205ecee230 100644
--- a/specification/communication/data-plane/Microsoft.CommunicationServicesTurn/preview/2021-02-22-preview1/examples/IssueTurnCredentials.json
+++ b/specification/communication/data-plane/Microsoft.CommunicationServicesTurn/preview/2021-02-22-preview1/examples/IssueTurnCredentials.json
@@ -10,7 +10,9 @@
       "body": {
         "turnServers": [
           {
-            "urls": "turn:131.107.255.255:3478",
+            "urls": [
+              "turn:131.107.255.255:3478"
+            ],
             "username": "AgAAJNOeygwB1uVGvuwAVMHV4PLhYDgY66Fg1dUZvQ4AAAAEhXrhc8uJFjOK8lxEsZk3KIpWxc0=",
             "credential": "9rl8ablFWj6/aqSuPLgLykLZKqw="
           }