# Deno v1.9.1 — Release & Upgrade Intelligence
- **Product:** Deno (https://deno.com)
- **Version:** v1.9.1
- **Released:** Apr 21, 2021
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/deno/updates/v1.9.1/

## Executive Summary (TL;DR)
Deno v1.9.1. Source highlight: feat(lsp, unstable): Implement textDocument/documentSymbol (#9981)

## New Features
- feat(lsp, unstable): Implement textDocument/documentSymbol (#9981)
- feat(lsp, unstable): implement textDocument/prepareCallHierarchy (#10061)
- feat(lsp, unstable): Implement textDocument/semanticTokens/full (#10233)
- feat(lsp, unstable): improve diagnostic status page (#10253)

## Bug Fixes
- fix: revert changes to Deno.Conn type (#10255)
- fix(lsp): handle x-typescript-types header on type only imports properly  (#10261)
- fix(lsp): remove documents when closed (#10254)
- fix(runtime): correct URL in Request (#10256)
- fix(runtime): handle race condition in postMessage where worker has terminated  (#10239)
- fix(runtime): hang during HTTP server response (#10197)