diff --git a/.gitmodules b/.gitmodules
index 81ba7f068..965bbb69e 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -109,3 +109,6 @@
 [submodule "hw/mcu/st/stm32l5xx_hal_driver"]
 	path = hw/mcu/st/stm32l5xx_hal_driver
 	url = https://github.com/STMicroelectronics/stm32l5xx_hal_driver.git
+[submodule "lib/CMSIS_5"]
+	path = lib/CMSIS_5
+	url = https://github.com/ARM-software/CMSIS_5.git
diff --git a/lib/CMSIS_5 b/lib/CMSIS_5
new file mode 160000
index 000000000..b7b26f50d
--- /dev/null
+++ b/lib/CMSIS_5
@@ -0,0 +1 @@
+Subproject commit b7b26f50d00072812aec8453f643e24bafedccb5