diff --git a/.gitmodules b/.gitmodules
index 1f83fb32..b868376b 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,6 @@
 [submodule "buildsystem/spack/spack"]
 	path = buildsystem/spack/spack
 	url = https://github.com/cameronrutherford/spack.git
+[submodule "doxygen-awesome-css"]
+	path = doxygen-awesome-css
+	url = https://github.com/jothepro/doxygen-awesome-css.git
diff --git a/doxygen-awesome-css b/doxygen-awesome-css
new file mode 160000
index 00000000..df83fbf2
--- /dev/null
+++ b/doxygen-awesome-css
@@ -0,0 +1 @@
+Subproject commit df83fbf22cfff76b875c13d324baf584c74e96d0