diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..57b6920
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "library/niotso"]
+	path = library/niotso
+	url = git@github.com:simtactics/niotso.git
diff --git a/library/niotso b/library/niotso
new file mode 160000
index 0000000..66ce473
--- /dev/null
+++ b/library/niotso
@@ -0,0 +1 @@
+Subproject commit 66ce47351427fa37c683f61003e0d3aa6b84e4f7