diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..41142ac
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "external/doxygen-awesome-css"]
+	path = external/doxygen-awesome-css
+	url = https://github.com/jothepro/doxygen-awesome-css.git
diff --git a/external/doxygen-awesome-css b/external/doxygen-awesome-css
new file mode 160000
index 0000000..a5efba0
--- /dev/null
+++ b/external/doxygen-awesome-css
@@ -0,0 +1 @@
+Subproject commit a5efba07a3d4fd6317d95657b3095b97e134b791