diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000000000000000000000000000000000000..8beed90767e77f7cafbe1ac15323351e741190fa
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "web/themes/hugo-flex"]
+	path = web/themes/hugo-flex
+	url = https://github.com/de-souza/hugo-flex.git