diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..22d5caf
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "ntween"]
+	path = ntween
+	url = https://git.nefrace.ru/nefrace/ntween.git
diff --git a/ntween b/ntween
new file mode 160000
index 0000000..7136c68
--- /dev/null
+++ b/ntween
@@ -0,0 +1 @@
+Subproject commit 7136c68f3e63470b9b1c80109dd0904151e08070