diff --git a/.gitmodules b/.gitmodules
index b211f80..b1a7f68 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -121,3 +121,6 @@
 [submodule "replacer"]
 	path = replacer
 	url = https://github.com/Sokomine/replacer
+[submodule "quartz"]
+	path = quartz
+	url = https://github.com/minetest-mods/quartz
diff --git a/quartz b/quartz
new file mode 160000
index 0000000..7b5d74c
--- /dev/null
+++ b/quartz
@@ -0,0 +1 @@
+Subproject commit 7b5d74cfdfae1a7caa539defde66232b0c240aa0