diff --git a/platformio.ini b/platformio.ini
index e9a63e3..1c8a2be 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -22,7 +22,7 @@ build_flags =
 lib_deps =
     https://github.com/yubox-node-org/ESPAsyncWebServer
     bblanchon/ArduinoJson @ ^6.19.4
-    https://github.com/bertmelis/espMqttClient.git
+    https://github.com/bertmelis/espMqttClient.git#v1.2.3
     nrf24/RF24 @ ^1.4.5
 
 extra_scripts =