diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..d6dffc6
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "ext/PropertyGrid"]
+	path = ext/PropertyGrid
+	url = https://github.com/itsmattkc/PropertyGrid
diff --git a/ext/PropertyGrid b/ext/PropertyGrid
new file mode 160000
index 0000000..7ba4fd1
--- /dev/null
+++ b/ext/PropertyGrid
@@ -0,0 +1 @@
+Subproject commit 7ba4fd1ce140aa85934de5f69704fbe827c4954d