diff --git a/platformio.ini b/platformio.ini
index d03de291d..7a0a051b4 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -110,8 +110,7 @@ build_flags               = ${esp_defaults.build_flags}
                             ; No exception code in firmware
                             -fno-exceptions
                             -lstdc++                            
-                            ; the following removes the 4-bytes alignment for PSTR(), waiting for a cleaner flag from Arduino Core
-                            -DPSTR\(s\)=\(__extension__\(\{static\ const\ char\ __c\[\]\ __attribute__\(\(__aligned__\(1\)\)\)\ __attribute__\(\(section\(\ \"\\\\\".irom0.pstr.\"\ __FILE__\ \".\"\ __STRINGIZE\(__LINE__\)\ \".\"\ \ __STRINGIZE\(__COUNTER__\)\ \"\\\\\"\,\ \\\\\"aSM\\\\\"\,\ \@progbits\,\ 1\ \#\"\)\)\)\ =\ \(s\)\;\ \&__c\[0\]\;\}\)\)
+                            ; the following removes the 4-bytes alignment for PSTR()
                             -DPSTR_ALIGN=1
                             ; restrict to minimal mime-types
                             -DMIMETYPE_MINIMAL
@@ -123,8 +122,8 @@ build_flags               = -DUSE_IR_REMOTE_FULL
 
 
 [core]
-; *** Esp8266 Arduino core 2.7.1
-platform                  = espressif8266@2.5.3
+; *** Esp8266 Arduino core 2.7.2
+platform                  = espressif8266@2.6.0
 platform_packages         = 
 build_unflags             = ${esp_defaults.build_unflags}
 build_flags               = ${esp82xx_defaults.build_flags}