The existing cyNeo4j app for Cytoscape was extended to support the DSMN graph database. This app was tested on the latest version of Cytoscape (3.9.1), using Java 11. The app (v2.2.0) can be downloaded from the Cytoscape Appstore (apps.cytoscape.org/apps/cyneo4j); the source code is available at github.com/cyNeo4j/cyNeo4j. The app has been extended with the following functionalities: