diff --git a/Makefile b/Makefile
index c3641968a..d984c7dcd 100644
--- a/Makefile
+++ b/Makefile
@@ -65,7 +65,7 @@ AR = emar
 endif
 SOFTFLOAT_OUT = $(abspath $(OUT)/softfloat)
 src/softfloat/build/Linux-RISCV-GCC/Makefile:
-	git submodule update --init src/softfloat/
+	git submodule update --depth 1 --init src/softfloat/
 SOFTFLOAT_LIB := $(SOFTFLOAT_OUT)/softfloat.a
 $(SOFTFLOAT_LIB): src/softfloat/build/Linux-RISCV-GCC/Makefile
 	$(MAKE) -C $(dir $<) BUILD_DIR=$(SOFTFLOAT_OUT) CC=$(CC) AR=$(AR)
@@ -100,7 +100,7 @@ ifeq ($(call has, GDBSTUB), 1)
 GDBSTUB_OUT = $(abspath $(OUT)/mini-gdbstub)
 GDBSTUB_COMM = 127.0.0.1:1234
 src/mini-gdbstub/Makefile:
-	git submodule update --init $(dir $@)
+	git submodule update --depth 1 --init $(dir $@)
 GDBSTUB_LIB := $(GDBSTUB_OUT)/libgdbstub.a
 $(GDBSTUB_LIB): src/mini-gdbstub/Makefile
 	$(MAKE) -C $(dir $<) O=$(dir $@)
diff --git a/mk/riscv-arch-test.mk b/mk/riscv-arch-test.mk
index 20e110374..a3e7445e4 100644
--- a/mk/riscv-arch-test.mk
+++ b/mk/riscv-arch-test.mk
@@ -13,7 +13,7 @@ arch-test: $(BIN)
 ifeq ($(CROSS_COMPILE),)
 	$(error GNU Toolchain for RISC-V is required to build architecture tests. Please check package installation)
 endif
-	git submodule update --init $(dir $(ARCH_TEST_DIR))
+	git submodule update --depth 1 --init $(dir $(ARCH_TEST_DIR))
 	$(Q)python3 -B $(RISCV_TARGET)/setup.py --riscv_device=$(RISCV_DEVICE)
 	$(Q)riscof run --work-dir=$(WORK) \
 			--config=$(RISCV_TARGET)/config.ini \