diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..a331068
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,6 @@
+[submodule "lib/squall"]
+	path = lib/squall
+	url = https://github.com/whoahq/squall
+[submodule "lib/system"]
+	path = lib/system
+	url = https://github.com/whoahq/system
diff --git a/lib/squall b/lib/squall
new file mode 160000
index 0000000..7e89d65
--- /dev/null
+++ b/lib/squall
@@ -0,0 +1 @@
+Subproject commit 7e89d65d7a42190f572a9c6ee12140c95647a4bf
diff --git a/lib/system b/lib/system
new file mode 160000
index 0000000..f886ab5
--- /dev/null
+++ b/lib/system
@@ -0,0 +1 @@
+Subproject commit f886ab5bc35b2e0d968baa8dec3faaccf385fbc3