diff --git a/examples/deployment/pipecat-cloud-daily-pstn-server/fastapi-webhook-server/server.py b/examples/deployment/pipecat-cloud-daily-pstn-server/fastapi-webhook-server/server.py
index 0e05f892b..26dd59283 100644
--- a/examples/deployment/pipecat-cloud-daily-pstn-server/fastapi-webhook-server/server.py
+++ b/examples/deployment/pipecat-cloud-daily-pstn-server/fastapi-webhook-server/server.py
@@ -141,6 +141,7 @@ async def dial(request: RoomRequest, raw_request: Request):
             "display_name": request.From,
             "sip_mode": "dial-in",
             "num_endpoints": 2 if request.call_transfer is not None else 1,
+            "codecs": {"audio": ["OPUS"]},
         }
         daily_room_properties["sip"] = sip_config
 
diff --git a/examples/deployment/pipecat-cloud-daily-pstn-server/nextjs-webhook-server/pages/api/dial.js b/examples/deployment/pipecat-cloud-daily-pstn-server/nextjs-webhook-server/pages/api/dial.js
index cdd3ef51c..a1905bd06 100644
--- a/examples/deployment/pipecat-cloud-daily-pstn-server/nextjs-webhook-server/pages/api/dial.js
+++ b/examples/deployment/pipecat-cloud-daily-pstn-server/nextjs-webhook-server/pages/api/dial.js
@@ -103,6 +103,7 @@ export default async function handler(req, res) {
         display_name: From,
         sip_mode: 'dial-in',
         num_endpoints: call_transfer !== null ? 2 : 1,
+        codecs: {"audio": ["OPUS"]},
       };
       daily_room_properties.sip = sip_config;
     }
@@ -172,4 +173,4 @@ export const config = {
       sizeLimit: '1mb',
     },
   },
-};
\ No newline at end of file
+};