Technology for publish-subscribe message updates is provided. In one example, a publish-subscribe messaging method may include receiving a message from a publisher. The message may include a tuple defining message data and a source identifier identifying a data source to update the message. The publication may be queued in a queue for publication to a subscriber. Updated message data may be retrieved from the data source identified in the tuple when the message reaches an update point of the queue. The updated message data may be inserted in the message to generate an updated message which may be published to the subscriber.