diff --git a/diagrams.net/src/index.js b/diagrams.net/src/index.js
index 81c9791c2..c951ceb60 100644
--- a/diagrams.net/src/index.js
+++ b/diagrams.net/src/index.js
@@ -73,7 +73,7 @@ import { SyntaxError, TimeoutError, Worker } from './worker.js'
       })
     })
   )
-  server.listen(9000)
+  server.listen(process.env.KROKI_DRAWIO_PORT ?? 8005)
 })().catch(err => {
   logger.error({ err }, 'Unable to start the service')
   process.exit(1)