diff --git a/.gitmodules b/.gitmodules
index 32d9767..61e416f 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -25,3 +25,6 @@
 [submodule "prometheus-formula"]
 	path = prometheus-formula
 	url = https://git.com.de/saltstack-formulas/prometheus-formula.git
+[submodule "nsd-formula"]
+	path = nsd-formula
+	url = https://git.com.de/saltstack-formulas/nsd-formula.git
diff --git a/nsd-formula b/nsd-formula
new file mode 160000
index 0000000..4b5887a
--- /dev/null
+++ b/nsd-formula
@@ -0,0 +1 @@
+Subproject commit 4b5887a1f0221a01c9e206556aef5a22f1fe3d5d