diff --git a/platformio.ini b/platformio.ini
index 1f5d417f3..ecb72a3fe 100755
--- a/platformio.ini
+++ b/platformio.ini
@@ -22,7 +22,7 @@ src_dir = sonoff
 ;env_default = sonoff-BR
 ;env_default = sonoff-CN
 ;env_default = sonoff-CZ
-env_default = sonoff-DE
+;env_default = sonoff-DE
 ;env_default = sonoff-ES
 ;env_default = sonoff-FR
 ;env_default = sonoff-GR
@@ -129,12 +129,12 @@ build_flags               = ${esp82xx_defaults.build_flags}
 
 [core_active]
 ; Select one core set for platform and build_flags
-platform                  = ${core_2_3_0.platform}
-build_flags               = ${core_2_3_0.build_flags}
+;platform                  = ${core_2_3_0.platform}
+;build_flags               = ${core_2_3_0.build_flags}
 ;platform                  = ${core_2_4_2.platform}
 ;build_flags               = ${core_2_4_2.build_flags}
-;platform                  = ${core_2_5_2.platform}
-;build_flags               = ${core_2_5_2.build_flags}
+platform                  = ${core_2_5_2.platform}
+build_flags               = ${core_2_5_2.build_flags}
 ;platform                  = ${core_stage.platform}
 ;build_flags               = ${core_stage.build_flags}