Hello, After upgrading the unified push server from 1.1.3-Final to 3.0.1 we are having issues with the REST sender API. We are using the java sender which i couldn't find an update for, so i assumed it would be compatible with 3.0.1. If it makes a difference this is running in the docker-compose setup. <dependency> <groupId>org.jboss.aerogear</groupId> <artifactId>unifiedpush-java-client</artifactId> <version>1.1.0.Final</version> </dependency> Request payload: { "message":{ "alert":"Test test", "sound":"default", "badge":-1, "consolidationKey":null, "windows":{ "type":null, "duration":null, "badge":null, "tileType":null, "toastType":null, "images":[ ], "textFields":[ ], "page":null }, "apns":{ "title":null, "action":null, "action-category":null, "localized-title-key":null, "localized-title-arguments":null, "url-args":null, "content-available":false }, "user-data":{ "test":"test test" }, "simple-push":null }, "criteria":{ "categories":null, "variants":null, "alias":null, "deviceType":null }, "config":{ "ttl":-1 } } Response: { "message": "Unrecognized field \"windows\" (class org.jboss.aerogear.unifiedpush.message.Message), not marked as ignorable (8 known properties: \"badge\", \"priority\", \"simple-push\", \"alert\", \"sound\", \"consolidationKey\", \"apns\", \"user-data\"])\n at [Source: (io.undertow.servlet.spec.ServletInputStreamImpl); line: 1, column: 98] (through reference chain: org.jboss.aerogear.unifiedpush.message.InternalUnifiedPushMessage[\"message\"]->org.jboss.aerogear.unifiedpush.message.Message[\"windows\"])" , "details": {} } Removing the "windows" field in a manual request seems to solve this issue, but there might be more hiding. What am I doing wrong? Is there a more up to date java sender library somewhere? Thanks, Yoann