diff --git a/controller_teensy/platformio.ini b/controller_teensy/platformio.ini
index 2311658..1cffc05 100644
--- a/controller_teensy/platformio.ini
+++ b/controller_teensy/platformio.ini
@@ -8,13 +8,14 @@
 ; Please visit documentation for the other options and examples
 ; https://docs.platformio.org/page/projectconf.html
 
-[env:teensy31]
-platform = teensy
-board = teensy31
+
+[platformio]
+default_envs = teensy31
+
+; Set/override default options for each "[env:***]"
+[env]
 framework = arduino
 
-
-
 monitor_speed = 115200
 
 build_flags = 
@@ -25,4 +26,14 @@ lib_deps =
     adafruit/Adafruit SSD1306@^2.5.7
     arduino-libraries/SD@^1.2.4
     https://github.com/adafruit/Adafruit_NeoPixel
-    https://github.com/milesburton/Arduino-Temperature-Control-Library/
\ No newline at end of file
+    https://github.com/milesburton/Arduino-Temperature-Control-Library/
+
+
+[env:teensy31]
+platform = teensy
+board = teensy31
+
+
+[env:teensy40]
+platform = teensy
+board = teensy40
\ No newline at end of file