git module update

.gitmodules

diff --git a/.gitmodules b/.gitmodules
index df69a25..789fb3d 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,9 +1,12 @@
 [submodule "caravel"]
 	path = caravel
 	url = https://github.com/efabless/caravel-lite.git
+	branch = master
 [submodule "verilog/rtl/qspim"]
 	path = verilog/rtl/qspim
 	url = https://github.com/dineshannayya/qspim.git
+	branch = master
 [submodule "verilog/rtl/yifive/ycr1c"]
 	path = verilog/rtl/yifive/ycr1c
 	url = https://github.com/dineshannayya/ycr1c.git
+	branch = master