diff --git a/platformio.ini b/platformio.ini
index 468a3b3..cedacaa 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -40,6 +40,7 @@ lib_deps =
 	Adafruit/Adafruit_BusIO
 	Adafruit/Adafruit_SSD1306
 	Adafruit/Adafruit-GFX-Library
+	PaulStoffregen/TimerOne
 monitor_speed = 115200
 monitor_flags = --echo
 
@@ -53,6 +54,7 @@ lib_deps =
 	arduino-libraries/Ethernet
 	SPI
 	marcoschwartz/LiquidCrystal_I2C
+	PaulStoffregen/TimerOne
 monitor_speed = 115200
 monitor_flags = --echo
 
@@ -80,5 +82,6 @@ lib_deps =
 	arduino-libraries/Ethernet
 	SPI
 	marcoschwartz/LiquidCrystal_I2C
+	PaulStoffregen/TimerOne
 monitor_speed = 115200
 monitor_flags = --echo