diff --git a/platformio.ini b/platformio.ini
index b15b245c8..f721a496a 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -67,7 +67,7 @@ build_flags               = ${esp82xx_defaults.build_flags}
 
 [core_2_5_1]
 ; *** Esp8266 core for Arduino version 2.5.1
-platform                  = espressif8266@~2.1.0
+platform                  = espressif8266@~2.1.1
 build_flags               = ${esp82xx_defaults.build_flags}
                             -Wl,-Teagle.flash.1m.ld
 ; Code optimization see https://github.com/esp8266/Arduino/issues/5790#issuecomment-475672473