diff --git a/platformio.ini b/platformio.ini
index 597843c..b13f061 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -5,7 +5,7 @@
 env_default = stc15w408as
 
 [env:stc15f204ea]
-platform = https://github.com/zerog2k/platform-mcs51.git
+platform = https://github.com/platformio/platform-intel_mcs51.git
 board = stc15f204ea
 ;; uploader & compiler/linker options in post_extra_script
 extra_scripts = post_extra_script.py
@@ -14,7 +14,7 @@ upload_protocol = stcgal
 upload_port = /dev/ttyUSB0
 
 [env:stc15w404as]
-platform = https://github.com/zerog2k/platform-mcs51.git
+platform = https://github.com/platformio/platform-intel_mcs51.git
 board = stc15w404as
 ;; uploader & compiler/linker options in post_extra_script
 extra_scripts = post_extra_script.py
@@ -25,7 +25,7 @@ upload_port = /dev/ttyUSB0
 ; if you have set the option on mcu to use reset pin.
 
 [env:stc15w408as]
-platform = https://github.com/zerog2k/platform-mcs51.git
+platform = https://github.com/platformio/platform-intel_mcs51.git
 board = stc15w408as
 ;; uploader & compiler/linker options in post_extra_script
 extra_scripts = post_extra_script.py