diff --git a/packages/@vue/cli-ui/apollo-server/pubsub.js b/packages/@vue/cli-ui/apollo-server/pubsub.js
index c6aca6e47..881b0dcca 100644
--- a/packages/@vue/cli-ui/apollo-server/pubsub.js
+++ b/packages/@vue/cli-ui/apollo-server/pubsub.js
@@ -1,5 +1,5 @@
 const { PubSub } = require('graphql-subscriptions')
 
 const pubsub = new PubSub()
-pubsub.ee.setMaxListeners(0)
+pubsub.ee.setMaxListeners(Infinity)
 module.exports = pubsub