diff --git a/src/activities/Elsa.Activities.Telnyx/Options/TelnyxOptions.cs b/src/activities/Elsa.Activities.Telnyx/Options/TelnyxOptions.cs
index 13bd9ef7a..b575a4451 100644
--- a/src/activities/Elsa.Activities.Telnyx/Options/TelnyxOptions.cs
+++ b/src/activities/Elsa.Activities.Telnyx/Options/TelnyxOptions.cs
@@ -15,7 +15,7 @@ namespace Elsa.Activities.Telnyx.Options
         }
         
         public IList<Type> PayloadTypes { get; set; }
-        public Uri ApiUrl { get; set; } = default!;
+        public Uri ApiUrl { get; set; } = new("https://api.telnyx.com");
         public string ApiKey { get; set; } = default!;
     }
 }
\ No newline at end of file
diff --git a/src/samples/dashboard/ElsaDashboard.Samples.Monolith/appsettings.json b/src/samples/dashboard/ElsaDashboard.Samples.Monolith/appsettings.json
index 31078274c..e4e987a36 100644
--- a/src/samples/dashboard/ElsaDashboard.Samples.Monolith/appsettings.json
+++ b/src/samples/dashboard/ElsaDashboard.Samples.Monolith/appsettings.json
@@ -21,7 +21,7 @@
         "ElsaServerUrl": "https://localhost:11000" 
     },
     "Telnyx": {
-        "ApiUrl": " https://api.telnyx.com",
+        "ApiUrl": "",
         "ApiKey": ""
     }
 }
\ No newline at end of file