diff --git a/.gitmodules b/.gitmodules
index 916301e..568d97b 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -4,3 +4,6 @@
 [submodule "UniHumanoid"]
 	path = UniHumanoid
 	url = https://github.com/ousttrue/UniHumanoid.git
+[submodule "DepthFirstScheduler"]
+	path = DepthFirstScheduler
+	url = https://github.com/ousttrue/DepthFirstScheduler.git
diff --git a/DepthFirstScheduler b/DepthFirstScheduler
new file mode 160000
index 0000000..724b4c5
--- /dev/null
+++ b/DepthFirstScheduler
@@ -0,0 +1 @@
+Subproject commit 724b4c559f804cf9de11424c58d0986773f63655
diff --git a/DepthFirstScheduler.meta b/DepthFirstScheduler.meta
new file mode 100644
index 0000000..9b42ed2
--- /dev/null
+++ b/DepthFirstScheduler.meta
@@ -0,0 +1,9 @@
+fileFormatVersion: 2
+guid: 6a7b54da70f565d4e8b45f843a6ba139
+folderAsset: yes
+timeCreated: 1535290899
+licenseType: Free
+DefaultImporter:
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: