diff --git a/variants/m5stack_coreink/platformio.ini b/variants/m5stack_coreink/platformio.ini
index d23ee79c2..a8f01edea 100644
--- a/variants/m5stack_coreink/platformio.ini
+++ b/variants/m5stack_coreink/platformio.ini
@@ -9,6 +9,7 @@ build_flags =
 lib_deps = 
   ${esp32_base.lib_deps}
   zinggjm/GxEPD2@^1.4.5
+  lewisxhe/PCF8563_Library@^0.0.1
 board_build.f_cpu = 240000000L
 upload_protocol = esptool
 upload_port = /dev/ttyACM*