diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..88e294e
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "blowfish"]
+	path = blowfish
+	url = https://github.com/avinal/blowfish
diff --git a/blowfish b/blowfish
new file mode 160000
index 0000000..ddeda3c
--- /dev/null
+++ b/blowfish
@@ -0,0 +1 @@
+Subproject commit ddeda3c8d45ee7ecf0ba34181de5ac2f1a8c7cd8