# Slack Developer Release: Python Slack SDK v3.43.0

- Product: Slack Developer (https://whatsnew.fyi/product/slack-developer)
- Vendor: Salesforce
- Date: 2026-06-30
- Original notes: https://docs.slack.dev/changelog/2026/06/30/py-slack-sdk
- Permalink: https://whatsnew.fyi/product/slack-developer/releases/feed-https-docs.slack.dev-changelog-2026-06-30-py-slack-sdk

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* We've added a public, read-only ts property to ChatStream and AsyncChatStream, enabling users to call the chat.update API method as a fallback when the server closes a stream due to undocumented tim…

- **added** — Added a public, read-only ts property to ChatStream and AsyncChatStream to enable calling the chat.update API method as a fallback when the server closes a stream