diff --git a/.gitmodules b/.gitmodules
deleted file mode 100644
index 772d424..0000000
--- a/.gitmodules
+++ /dev/null
@@ -1,3 +0,0 @@
-[submodule "lib/heatshrink"]
-	path = lib/heatshrink
-	url = https://github.com/atomicobject/heatshrink.git
diff --git a/Makefile b/Makefile
index 8629ddb..5b694ae 100644
--- a/Makefile
+++ b/Makefile
@@ -19,7 +19,7 @@ XTENSA_TOOLS_ROOT ?= $(abspath ../esp-open-sdk/xtensa-lx106-elf/bin)/
 
 # Base directory of the ESP8266 SDK package, absolute
 # Typically you'll download from Espressif's BBS, http://bbs.espressif.com/viewforum.php?f=5
-SDK_BASE	?= $(abspath ../esp_iot_sdk_v1.2.0)
+SDK_BASE	?= $(abspath ../esp_iot_sdk_v1.3.0)
 
 # Esptool.py path and port, only used for 1-time serial flashing
 # Typically you'll use https://github.com/themadinventor/esptool
@@ -30,7 +30,7 @@ ESPBAUD		?= 460800
 # --------------- chipset configuration   ---------------
 
 # Pick your flash size: "512KB", "1MB", or "4MB"
-FLASH_SIZE ?= 512KB
+FLASH_SIZE ?= 4MB
 
 ifeq ("$(FLASH_SIZE)","512KB")
 # Winbond 25Q40 512KB flash, typ for esp-01 thru esp-11