diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..dd62212
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "themes/hextra"]
+	path = themes/hextra
+	url = https://github.com/imfing/hextra.git
diff --git a/themes/hextra b/themes/hextra
new file mode 160000
index 0000000..ba7707d
--- /dev/null
+++ b/themes/hextra
@@ -0,0 +1 @@
+Subproject commit ba7707d4d9f922ea82a9645af150a6216d343669