diff --git a/Readme.md b/Readme.md
index 54c75b0..6d42c98 100644
--- a/Readme.md
+++ b/Readme.md
@@ -55,7 +55,7 @@ Installation
 In the [release section](../../releases) you can find a couple of pre-build binaries.<br>
 They are devided into binaries for an initial flash (xxx-all.bin) and binaries for updating an existing device (xxx-update.bin). 
 
-For other Hardware refer to the [online build service](https://circleci.com/).
+For other Hardware refer to the [online build service](doc/BuildService.md).
 
 Initial Flash
 *************
@@ -165,6 +165,10 @@ For details refer to the [example description](lib/exampletask/Readme.md).
 
 Changelog
 ---------
+[20231228](../../releases/tag/20231228)
+**********
+* lock AsyncTCP-esphome to 2.0.1 to avoid compile errors
+* own main loop to avoid deadlocks with serial send in user tasks
 [20231105](../../releases/tag/20231105)
 **********
 * support for ESP32-S3
diff --git a/platformio.ini b/platformio.ini
index b6a00bc..b249ef8 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -26,6 +26,7 @@ lib_deps =
         ttlappalainen/NMEA2000-library @ 4.18.9
 	ttlappalainen/NMEA0183 @ 1.9.1
 	ArduinoJson @ 6.18.5
+	AsyncTCP-esphome @ 2.0.1
 	ottowinter/ESPAsyncWebServer-esphome@2.0.1
     fastled/FastLED @ 3.6.0
 	FS