diff --git a/modules/swagger-codegen/src/main/resources/flaskConnexion/app.mustache b/modules/swagger-codegen/src/main/resources/flaskConnexion/app.mustache
index 14af64be6f9..ded223fb36d 100644
--- a/modules/swagger-codegen/src/main/resources/flaskConnexion/app.mustache
+++ b/modules/swagger-codegen/src/main/resources/flaskConnexion/app.mustache
@@ -3,7 +3,6 @@
 import connexion
 
 if __name__ == '__main__':
-    app = connexion.App(__name__, {{serverPort}},
-    specification_dir='./swagger/')
+    app = connexion.App(__name__, specification_dir='./swagger/')
     app.add_api('swagger.yaml', arguments={'title': '{{appDescription}}'})
-    app.run()
+    app.run(port={{serverPort}})