diff --git a/ESP32-Arduino-build-&-required-libaries.md b/ESP32-Arduino-build-&-required-libaries.md
index 4c071ca..44c8b50 100644
--- a/ESP32-Arduino-build-&-required-libaries.md
+++ b/ESP32-Arduino-build-&-required-libaries.md
@@ -44,6 +44,5 @@ https://dl.espressif.com/dl/package_esp32_index.json (V1.0.1)
       - Please refer to https://arduinojson.org/v5/faq/
 
    - Adafruit_GFX: https://github.com/adafruit/Adafruit-GFX-Library
-
    - Adafruit SH1106 (for ESP32): https://github.com/nhatuan84/esp32-sh1106-oled
-
+   - PubSubClient - https://github.com/knolleary/pubsubclient
\ No newline at end of file