diff --git a/.gitmodules b/.gitmodules
index 437ba52..65a2f05 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,3 @@
 [submodule "themes/hugo-theme-bootstrap"]
 	path = themes/hugo-theme-bootstrap
-	url = https://github.com/razonyang/hugo-theme-bootstrap.git
+	url = https://github.com/razonyang/hugo-theme-bootstrap
diff --git a/themes/hugo-theme-bootstrap b/themes/hugo-theme-bootstrap
new file mode 160000
index 0000000..e99c3aa
--- /dev/null
+++ b/themes/hugo-theme-bootstrap
@@ -0,0 +1 @@
+Subproject commit e99c3aadd8acd0a9c126c3857c77eeaf82988c6a