diff --git a/.gitignore b/.gitignore
index 719ec5f..a9a5aec 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1 @@
 tmp
-repos
diff --git a/repos/BPlusTree3 b/repos/BPlusTree3
new file mode 160000
index 0000000..80e8206
--- /dev/null
+++ b/repos/BPlusTree3
@@ -0,0 +1 @@
+Subproject commit 80e820661b14108ff610bce45b46fcc49937edcc