diff --git a/.gitmodules b/.gitmodules
index 23a0024..1b18867 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -91,3 +91,6 @@
 [submodule "lovers"]
 	path = lovers
 	url = https://github.com/chdoig/pelican-bootstrap3-lovers.git
+[submodule "BT3-Flat"]
+	path = BT3-Flat
+	url = https://github.com/KenMercusLai/BT3-Flat.git
diff --git a/BT3-Flat b/BT3-Flat
new file mode 160000
index 0000000..656296a
--- /dev/null
+++ b/BT3-Flat
@@ -0,0 +1 @@
+Subproject commit 656296ab29a76d980155427f1f1ffe1892966a2a