diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..48756c3
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "packages/signals"]
+	path = packages/signals
+	url = https://github.com/rodydavis/signals.dart
diff --git a/packages/signals b/packages/signals
new file mode 160000
index 0000000..ad01646
--- /dev/null
+++ b/packages/signals
@@ -0,0 +1 @@
+Subproject commit ad01646b69b5821f66f52cd73966a798b0c0629f