diff --git a/README.md b/README.md
index d807a397caf..c5b909252c8 100644
--- a/README.md
+++ b/README.md
@@ -25,9 +25,6 @@ Generate UML diagrams from textual descriptions.
 [![CI](https://github.com/plantuml/plantuml/actions/workflows/ci.yml/badge.svg?color=chocolate)](https://github.com/plantuml/plantuml/actions/workflows/ci.yml)
 [![snapshot javadoc](https://img.shields.io/badge/javadoc-snapshot-chocolate.svg?logo=github)](https://plantuml.github.io/plantuml/)
 
-> [!IMPORTANT]
-> [PlantUML is **not** affected by the log4j vulnerability.](https://github.com/plantuml/plantuml/issues/826)
-
 ## ℹ️ About
 
 PlantUML is a component that allows you to create various UML diagrams through simple textual descriptions. From sequence diagrams to deployment diagrams and beyond, PlantUML provides an easy way to create visual representations of complex systems.
@@ -62,7 +59,7 @@ PlantUML is a component that allows you to create various UML diagrams through s
   - [Mathematical Notations (AsciiMath, JLaTeXMath)](http://plantuml.com/ascii-math)
   - Entity Relationship (ER) diagram
     - [Information Engineering (IE) diagram](http://plantuml.com/ie-diagram)
-    - [Entity Relationship (ER) diagram (Chen's notation)](http://alphadoc.plantuml.com/doc/markdown/en/er-diagram)
+    - [Entity Relationship (ER) diagram (Chen's notation)](http://plantuml.com/er-diagram)
 
 ### 📣 Additional Features
 
@@ -75,6 +72,13 @@ PlantUML is a component that allows you to create various UML diagrams through s
 
 For a more detailed overview, visit [PlantUML Official Website](https://plantuml.com/).
 
+## 🛡 Security
+
+See [Security Policy](SECURITY.md) and [Security overview](https://github.com/plantuml/plantuml/security).
+
+> [!IMPORTANT]
+> [PlantUML is **not** affected by the log4j vulnerability.](https://github.com/plantuml/plantuml/issues/826)
+
 ## 🚀 Getting Started
 
 Whether you're looking to use PlantUML as a standalone application or as a component in your own project, getting started is simple. Check out the official [PlantUML setup guide](https://plantuml.com/starting) for instructions on how to set up PlantUML on your system.