diff --git a/.gitmodules b/.gitmodules
index 9953293..b491221 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -310,3 +310,6 @@
 [submodule "urlview"]
 	path = urlview
 	url = https://aur.archlinux.org/urlview.git
+[submodule "ruby-ddmetrics"]
+	path = ruby-ddmetrics
+	url = ssh://aur@aur.archlinux.org/ruby-ddmetrics.git
diff --git a/ruby-ddmetrics b/ruby-ddmetrics
new file mode 160000
index 0000000..7ba98f8
--- /dev/null
+++ b/ruby-ddmetrics
@@ -0,0 +1 @@
+Subproject commit 7ba98f82927ff33361f8412d484e52a39ac034b7