diff --git a/src/X.Extensions.Logging.Telegram/README.md b/src/X.Extensions.Logging.Telegram/README.md
index 6485832..a4d31d9 100644
--- a/src/X.Extensions.Logging.Telegram/README.md
+++ b/src/X.Extensions.Logging.Telegram/README.md
@@ -13,7 +13,7 @@ var options = new TelegramLoggerOptions(LogLevel.Information)
 {
     AccessToken = "1234567890:AAAaaAAaa_AaAAaa-AAaAAAaAAaAaAaAAAA",
     ChatId = "-0000000000000",
-    Source = "Human Readable Project Name"
+    FormatterConfiguration = new FormatterConfiguration { ReadableApplicationName = "Human Readable Project Name" }
 };
 
 ...
@@ -42,7 +42,9 @@ builder
       },
       "AccessToken": "1234567890:AAAaaAAaa_AaAAaa-AAaAAAaAAaAaAaAAAA",
       "ChatId": "1234567890",
-      "Source": "Human Readable Project Name"
+      "FormatterConfiguration": {
+          "ReadableApplicationName": "Human Readable Project Name"
+      }
     }
   },
   "AllowedHosts": "*"
@@ -84,4 +86,4 @@ private ITelegramMessageFormatter CreateFormatter(string name)
 logBuilder.AddTelegram(options, CreateFormatter);
 ```
 
-For using custom message formatter delegate Func<string, ITelegramMessageFormatter> should be passed to extensions method AddTelegram. Delegate should be used because formatter needs to know which category is used for rendering the message.
\ No newline at end of file
+For using custom message formatter delegate Func<string, ITelegramMessageFormatter> should be passed to extensions method AddTelegram. Delegate should be used because formatter needs to know which category is used for rendering the message.