diff --git a/.gitmodules b/.gitmodules
index 9358432..a269ff6 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,4 @@
 [submodule "c-style-checker"]
 	path = c-style-checker
 	url = https://git.shimatta.de/mhu/c-style-checker
+	branch = master