diff --git a/platformio.ini b/platformio.ini
index 91bdd86756..43bc5e849f 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -149,6 +149,7 @@ lib_deps =
     AsyncTCP@1.0.3
     Esp Async WebServer@1.2.0
     IRremoteESP8266@2.7.3
+    arduinoFFT@1.5.5
   #For use SSD1306 OLED display uncomment following
     #U8g2@~2.27.2
   #For Dallas sensor uncomment following 2 lines