diff --git a/platformio.ini b/platformio.ini
index bf60dd8..7f8700e 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -12,7 +12,7 @@
 version = 0.1.2
 
 [env:esp32dev]
-platform = espressif32
+platform = espressif32 @ 4.4.0
 board = esp32dev
 framework = arduino
 upload_speed = 1500000
@@ -20,11 +20,7 @@ monitor_speed = 115200
 monitor_filters = 
   esp32_exception_decoder
 build_flags =
-	-D CORE_DEBUG_LEVEL=0
-	; -D VERBOSE_DEBUG=1
+  -D CORE_DEBUG_LEVEL=0
 lib_deps =
   https://github.com/hpsaturn/M5StickC-Plus.git
-	https://github.com/hpsaturn/Arduino-DCF77.git
-	; adafruit/RTClib@^2.1.1
-  ; Time@1.6.1        
-  ; Timezone@1.2.4
+  https://github.com/hpsaturn/Arduino-DCF77.git