diff --git a/README.md b/README.md
index 68ef6547..fbe0640d 100644
--- a/README.md
+++ b/README.md
@@ -481,6 +481,9 @@ TODO:
 - venue
 
 ## Changelog
+### 1.5.4 (2020-03-11)
+* (bluefox) Improvement of callmebot
+
 ### 1.5.3 (2020-02-23)
 * (foxriver76) removed usage of adapter.objects
 * (Haba) Fix of the response for the "callback_query" event
diff --git a/io-package.json b/io-package.json
index 6e6f8772..9bdf4669 100644
--- a/io-package.json
+++ b/io-package.json
@@ -4,8 +4,20 @@
         "require": {
             "js-controller": ">2.0.0"
         },
-        "version": "1.5.3",
+        "version": "1.5.4",
         "news": {
+            "1.5.4": {
+                "en": "Improvement of callmebot",
+                "de": "Verbesserung des Callmebot",
+                "ru": "Улучшение callmebot",
+                "pt": "Melhoria do callmebot",
+                "nl": "Verbetering van callmebot",
+                "fr": "Amélioration de callmebot",
+                "it": "Miglioramento di callmebot",
+                "es": "Mejora de callmebot",
+                "pl": "Ulepszenie callmebot",
+                "zh-cn": "Callmebot的改进"
+            },
             "1.5.3": {
                 "en": "Invalid parameters were checked\nRemoved usage of adapter.objects\nFixed the response for the \"callback_query\" event",
                 "de": "Ungültige Parameter wurden überprüft\nVerwendung von adapter.objects entfernt\nDie Antwort für das Ereignis \"callback_query\" wurde behoben",
diff --git a/main.js b/main.js
index 0b787d44..98158ea5 100644
--- a/main.js
+++ b/main.js
@@ -940,7 +940,7 @@ function callUsers(users, text, lang, file, repeats, cb) {
         }
         request = request || require('request');
 
-        let url = 'http://api.callmebot.com/start.php?';
+        let url = 'http://api.callmebot.com/start.php?source=iobroker&';
         const params = ['user=' + encodeURIComponent(user)];
         if (file) {
             params.push('file=' + encodeURIComponent(file));
diff --git a/package.json b/package.json
index 02341c1e..b64795ad 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "iobroker.telegram",
   "description": "The adapter allows to send and receive telegram messages from ioBroker and to be a broker.",
-  "version": "1.5.3",
+  "version": "1.5.4",
   "author": "bluefox <dogafox@gmail.com>",
   "homepage": "https://github.com/iobroker-community-adapters/ioBroker.telegram",
   "repository": {