diff --git a/.gitmodules b/.gitmodules
index c6b9fcda..15f76dd2 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,4 @@
 [submodule "content/private"]
 	path = content/private
 	url = gitea:tomoyanonymous/quartz-research-note-private.git
+	branch = main
\ No newline at end of file