diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..b426a68
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "themes/hugo-theme-lowtech"]
+	path = themes/hugo-theme-lowtech
+	url = https://git.weko.io/kosssi/hugo-theme-lowtech.git
diff --git a/themes/hugo-theme-lowtech b/themes/hugo-theme-lowtech
new file mode 160000
index 0000000..08c42b1
--- /dev/null
+++ b/themes/hugo-theme-lowtech
@@ -0,0 +1 @@
+Subproject commit 08c42b16faaa248bd6680e861b528a99a456a915