diff --git a/implementation/README.md b/implementation/README.md
index c58b612f..f2138248 100644
--- a/implementation/README.md
+++ b/implementation/README.md
@@ -11,6 +11,7 @@ In addition, there are the following modules that extend the Core:
 - eNotice
 - eOrdering
 - eSubmission
+- eInvoicing
 ---
 
 Each module folder is structured as follows: