diff --git a/resource/nrf52_sdk/components/toolchain/gcc/Makefile.windows b/resource/nrf52_sdk/components/toolchain/gcc/Makefile.windows
index aa1642c..54dbc80 100644
--- a/resource/nrf52_sdk/components/toolchain/gcc/Makefile.windows
+++ b/resource/nrf52_sdk/components/toolchain/gcc/Makefile.windows
@@ -1,3 +1,3 @@
-GNU_INSTALL_ROOT := C:/UserProgram/arm_gcc/none/bin/
-GNU_VERSION := 10.3.1
-GNU_PREFIX := arm-none-eabi
\ No newline at end of file
+GNU_INSTALL_ROOT ?= C:/Program Files (x86)/GNU Arm Embedded Toolchain/9 2020-q2-update/bin/
+GNU_VERSION ?= 9.3.1
+GNU_PREFIX ?= arm-none-eabi
\ No newline at end of file