diff --git a/.gitmodules b/.gitmodules
index 4350a2c..d798fd5 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -9,6 +9,7 @@
 [submodule "vboot"]
 	path = 3rdparty/vboot
 	url = ../vboot.git
+	branch = main
 [submodule "arm-trusted-firmware"]
 	path = 3rdparty/arm-trusted-firmware
 	url = ../arm-trusted-firmware.git