diff --git a/.gitmodules b/.gitmodules
index 5dc6aabe7ab7..3d44a61bc53a 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -127,3 +127,6 @@
 [submodule "ext/au.com.agileware.xerotweaks"]
 	path = ext/au.com.agileware.xerotweaks
 	url = https://github.com/agileware/au.com.agileware.xerotweaks.git
+[submodule "ext/au.com.agileware.invoice-membership-contact"]
+	path = ext/au.com.agileware.invoice-membership-contact
+	url = https://github.com/agileware/au.com.agileware.invoice-membership-contact.git
diff --git a/ext/au.com.agileware.invoice-membership-contact b/ext/au.com.agileware.invoice-membership-contact
new file mode 160000
index 000000000000..bc8c7eb5166b
--- /dev/null
+++ b/ext/au.com.agileware.invoice-membership-contact
@@ -0,0 +1 @@
+Subproject commit bc8c7eb5166bd086d0932fe96548a081de76d7fd