diff --git a/platformio.ini b/platformio.ini
index 671a6f284..8d349d974 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -119,10 +119,10 @@ 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_4_2.platform}
-build_flags               = ${core_2_4_2.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_0.platform}
 ;build_flags               = ${core_2_5_0.build_flags}
 ;platform                  = ${core_stage.platform}