diff --git a/.gitmodules b/.gitmodules
deleted file mode 100644
index 87938246..00000000
--- a/.gitmodules
+++ /dev/null
@@ -1,6 +0,0 @@
-[submodule "libraries/PacketSerial"]
-	path = lib/PacketSerial
-	url = https://github.com/bakercp/PacketSerial.git
-[submodule "libraries/Adafruit_MCP23008"]
-	url = https://github.com/adafruit/Adafruit-MCP23008-library.git
-	path = lib/Adafruit_MCP23008
diff --git a/platformio.ini b/platformio.ini
index 9d5adb81..d5443ede 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -13,13 +13,19 @@ default_envs = uno, ayab-esp32
 
 [env]
 framework = arduino
-extra_scripts =
-    pre:scripts/preBuild.py
+extra_scripts = 
+	pre:scripts/preBuild.py
 
 [env:uno]
 platform = atmelavr
 board = uno
+lib_deps = 
+	adafruit/Adafruit MCP23017 Arduino Library@^2.3.2
+	bakercp/PacketSerial@^1.4.0
 
 [env:ayab-esp32]
 platform = espressif32
 board = ayab-esp32
+lib_deps = 
+	adafruit/Adafruit MCP23017 Arduino Library@^2.3.2
+	bakercp/PacketSerial@^1.4.0