diff --git a/README.md b/README.md
index 0e28b28c..08ec62f4 100644
--- a/README.md
+++ b/README.md
@@ -190,6 +190,13 @@ $ npm login
 $ npm run publish:all
 ```
 
+#### Updating the demo files
+
+Run the following:
+```shell
+cd demo/java/network-viewer-demo-data && mvn compile exec:exec
+```
+
 ### Notes :
 
 - Check [license-checker-config.json](license-checker-config.json) for license white list and exclusion.
diff --git a/demo/java/network-viewer-demo-data/pom.xml b/demo/java/network-viewer-demo-data/pom.xml
index 81f48ce3..2ecb0bf3 100644
--- a/demo/java/network-viewer-demo-data/pom.xml
+++ b/demo/java/network-viewer-demo-data/pom.xml
@@ -101,4 +101,22 @@
         </dependency>
     </dependencies>
 
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.codehaus.mojo</groupId>
+                <artifactId>exec-maven-plugin</artifactId>
+                <version>3.6.3</version>
+                <configuration>
+                    <executable>java</executable>
+                    <arguments>
+                        <argument>-classpath</argument>
+                        <classpath/>
+                        <argument>com.powsybl.viewer.demo.DemoFilesGenerator</argument>
+                    </arguments>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
 </project>
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