diff --git a/platformio.ini b/platformio.ini
index 970f86f..aecbd85 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -247,6 +247,10 @@ build_flags =
 extends = env:pico-common
 board = rpipicow
 
+build_flags = 
+    ${env:pico-common.build_flags}
+    -DSERIAL_PORT_LITE
+
 ; ======
 ; RP2350
 ; ======
diff --git a/version b/version
index 2995b01..e86f37c 100644
--- a/version
+++ b/version
@@ -1 +1 @@
-0.0.5-alpha.1
+0.0.5-alpha.2