diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..5403703
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,6 @@
+[submodule "linux-firmware.git"]
+	path = linux-firmware.git
+	url = ../mirror_linux-firmware
+[submodule "dvb-firmware.git"]
+	path = dvb-firmware.git
+	url = ../mirror_dvb-firmware
diff --git a/Makefile b/Makefile
index f6fdd53..76149c2 100644
--- a/Makefile
+++ b/Makefile
@@ -39,3 +39,13 @@ ${FW_DEB} fw: control.firmware linux-firmware.git/WHENCE dvb-firmware.git/README
 	install -d fwdata/DEBIAN
 	sed -e 's/@VERSION@/${FW_VER}-${FW_REL}/' <control.firmware >fwdata/DEBIAN/control
 	dpkg-deb --build fwdata ${FW_DEB}
+
+# upgrade to current master
+.PHONY: update_modules
+update_modules: submodules
+	git submodule foreach 'git pull --ff-only origin master'
+
+# make sure submodules were initialized
+.PHONY: submodules
+submodules dvb-firmware.git/README linux-firmware.git/WHENCE:
+	test -f "linux-firmware.git/WHENCE" || git submodule update --init
diff --git a/dvb-firmware.git b/dvb-firmware.git
new file mode 160000
index 0000000..967e545
--- /dev/null
+++ b/dvb-firmware.git
@@ -0,0 +1 @@
+Subproject commit 967e54512be77001f09648b2693bf4aa590383a2
diff --git a/linux-firmware.git b/linux-firmware.git
new file mode 160000
index 0000000..44d8e8d
--- /dev/null
+++ b/linux-firmware.git
@@ -0,0 +1 @@
+Subproject commit 44d8e8d4fdcdff56e9e21208d4b4aa7cd6962656