diff --git a/.gitmodules b/.gitmodules
index ded58bc..787b62f 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -31,3 +31,6 @@
 [submodule "unbound-formula"]
 	path = unbound-formula
 	url = https://git.com.de/saltstack-formulas/unbound-formula.git
+[submodule "apache-formula"]
+	path = apache-formula
+	url = https://git.com.de/saltstack-formulas/apache-formula.git
diff --git a/apache-formula b/apache-formula
new file mode 160000
index 0000000..1553a9d
--- /dev/null
+++ b/apache-formula
@@ -0,0 +1 @@
+Subproject commit 1553a9d5bcce3213900da70b9ba503b2c4ea7860