diff --git a/.gitmodules b/.gitmodules
index 965bbb69e..dd55bdc0c 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -4,9 +4,6 @@
 [submodule "tools/uf2"]
 	path = tools/uf2
 	url = https://github.com/microsoft/uf2.git
-[submodule "hw/mcu/st/st_driver"]
-	path = hw/mcu/st/st_driver
-	url = https://github.com/hathach/st_driver.git
 [submodule "hw/mcu/sony/cxd56/spresense-exported-sdk"]
 	path = hw/mcu/sony/cxd56/spresense-exported-sdk
 	url = https://github.com/sonydevworld/spresense-exported-sdk.git
diff --git a/hw/mcu/st/st_driver b/hw/mcu/st/st_driver
deleted file mode 160000
index ceb49a6f2..000000000
--- a/hw/mcu/st/st_driver
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit ceb49a6f2d4afbf88ed29de94bb86095f41761ac