diff --git a/Makefile b/Makefile
index f548e14..2b15d9a 100644
--- a/Makefile
+++ b/Makefile
@@ -10,8 +10,11 @@ RISCV_SYSROOT ?= $(PWD)/../sysroot
 JOBS ?= 8
 
 .PHONY: all
-all: test test-e2e
+all: init format test test-e2e
 
+.PHONY: init
+init:
+	git submodule update --init --recursive
 
 .PHONY: format
 .SILENT: format