diff --git a/.gitmodules b/.gitmodules
index a17de5d..a88e9fe 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -37,3 +37,6 @@
 [submodule "lib/minify"]
 	path = lib/minify
 	url = ../lib_minify.git
+[submodule "lib/phpdocumentor"]
+	path = lib/phpdocumentor
+	url = ../lib_phpdocumentor.git
diff --git a/lib/phpdocumentor b/lib/phpdocumentor
new file mode 160000
index 0000000..3e9cbe2
--- /dev/null
+++ b/lib/phpdocumentor
@@ -0,0 +1 @@
+Subproject commit 3e9cbe234e4de6e50ba3cda1344abd982db5083f