diff --git a/.gitmodules b/.gitmodules
index f7c7b16..89ec7f2 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -2,3 +2,7 @@
 	path = external/mesytec-mvlc
 	url = ../mesytec-mvlc.git
 
+[submodule "nng"]
+	path = external/nng
+	url = https://github.com/nanomsg/nng.git
+	branch = main
diff --git a/external/nng b/external/nng
new file mode 160000
index 0000000..29aff2b
--- /dev/null
+++ b/external/nng
@@ -0,0 +1 @@
+Subproject commit 29aff2bacc9e2cfa6dcc52155d2816582617f918