diff --git a/platformio.ini b/platformio.ini
index 2be68e0..0f91a89 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -56,6 +56,8 @@ lib_ldf_mode = off
 monitor_speed = 115200
 build_flags = 
 	-D PIO_ENV_BUILD=$PIOENV
+#	-D CONFIG_ASYNC_TCP_RUNNING_CORE=1      # async_tcp task core assignment (default is any core)
+	-D CONFIG_ASYNC_TCP_STACK_SIZE=4096     # reduce the stack size (default is 16K)
 	-std=gnu++17
 build_unflags =
 	-std=gnu++11