diff --git a/.gitmodules b/.gitmodules
index 61e416f..ded58bc 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -28,3 +28,6 @@
 [submodule "nsd-formula"]
 	path = nsd-formula
 	url = https://git.com.de/saltstack-formulas/nsd-formula.git
+[submodule "unbound-formula"]
+	path = unbound-formula
+	url = https://git.com.de/saltstack-formulas/unbound-formula.git
diff --git a/unbound-formula b/unbound-formula
new file mode 160000
index 0000000..d2bd701
--- /dev/null
+++ b/unbound-formula
@@ -0,0 +1 @@
+Subproject commit d2bd7017eed03d62fdc5412e41c97c874aa22d9e