diff --git a/README.md b/README.md
index e81560b5..5bcfff64 100644
--- a/README.md
+++ b/README.md
@@ -46,6 +46,8 @@ Documentation
 
 For specific documentation on how to install and use MongODM, visit our [Wiki](https://github.com/Etherna/mongodm/wiki).
 
+Graphic documentation is maintained with https://www.diagrams.net/ software.
+
 Issue reports
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