diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..14e57fc
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "pushover-bash"]
+	path = pushover-bash
+	url = https://github.com/akusei/pushover-bash.git
diff --git a/pushover-bash b/pushover-bash
new file mode 160000
index 0000000..4547964
--- /dev/null
+++ b/pushover-bash
@@ -0,0 +1 @@
+Subproject commit 4547964a4130342e1cd6f9e72d81b0da84fc8224