diff --git a/.gitmodules b/.gitmodules
index 5fe5a05..69779f0 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,6 @@
 [submodule "modules/postfix"]
 	path = modules/postfix
 	url = gogs@lattuga.net:opuppet/module-postfix.git
+[submodule "modules/common"]
+	path = modules/common
+	url = gogs@lattuga.net:opuppet/module-common.git
diff --git a/modules/common b/modules/common
new file mode 160000
index 0000000..ac5da1d
--- /dev/null
+++ b/modules/common
@@ -0,0 +1 @@
+Subproject commit ac5da1df281e636ecffe260b681e8119a1057e1d