← Blog · 2026-10-28

Claude Code Not Updating? 12 Causes and Fixes for claude update and Auto-Update

30-second test: in your shell (not inside a session), run claude --version, then claude update, then claude --version again. If claude update prints Successfully updated from <old> to version <new> but sessions still show the old version, start at cause 1. If it prints Claude is up to date!, you're on Homebrew, WinGet or apk: go to cause 2. If it prints an error, find it in the table below.

Native installs of Claude Code update themselves: Claude Code checks for updates on startup and periodically while running, downloads and installs the new version in the background, and the update takes effect the next time you start it. Homebrew, WinGet, apt, dnf and apk installs don't auto-update by default. So "it never updates" usually means a missing restart, an install method that doesn't self-update, or a setting that switched updates off.

Two commands that tell you most of it

• claude doctor prints read-only installation and settings diagnostics without starting a session. Look at the Auto-updates line (it shows enabled, or disabled (set by env: DISABLE_AUTOUPDATER) when that's set) and the Last update attempt line, which records the result of the last background update.
• claude update applies an update right away. It reports Successfully updated from <old> to version <new>, or Claude Code is up to date (<version>) if you already have the newest one. Installs managed by Homebrew, WinGet or apk report Claude is up to date! instead.

Match your error

Auto-update failed · Run claude doctor in the footer

This red line means Claude Code tried to update itself in the background and the update didn't install. You can keep working; nothing is broken. claude doctor will only show Last update attempt: failed (install_failed) with a date and no cause, so skip it: run claude update in your shell instead. That either finishes the update or prints the real error, which you can match in the table above.

12 causes, in the order to check them

1. The update installed, but you haven't restarted. Background updates take effect the next time you start Claude Code, so a session that's been open for days keeps running the old version. Exit the session and start claude again, then check claude --version.
2. Your install method doesn't auto-update. Only native installs (the curl ... install.sh, install.ps1 or install.cmd installer) update in the background. Upgrade the others yourself: brew upgrade claude-code (or brew upgrade claude-code@latest), winget upgrade Anthropic.ClaudeCode, sudo apt update && sudo apt upgrade claude-code, sudo dnf upgrade claude-code, or apk update && apk upgrade claude-code. For Homebrew and WinGet you can opt in to automatic upgrades by setting CLAUDE_CODE_PACKAGE_MANAGER_AUTO_UPDATE=1: Claude Code then runs the upgrade in the background when a new version is available and shows a restart prompt on success. On WinGet that upgrade can fail while Claude Code is running because Windows locks the executable, and Claude Code shows you the manual command instead. apt, dnf and apk always need a manual upgrade because they need elevated privileges. Known issue: Claude Code can tell you about an update before the package manager has it, so if an upgrade fails, wait and try later.
3. You're on the stable channel, on purpose or not. Native installs follow the latest channel by default. The stable channel serves a version that's typically about a week old and skips releases with major regressions, so being "behind" is expected there. Check /config → Auto-update channel, or look for "autoUpdatesChannel": "stable" in your settings files; claude install stable also saves that choice. On Homebrew the cask name decides instead: claude-code tracks stable and claude-code@latest tracks latest, and the autoUpdatesChannel setting is ignored. If brew upgrade --cask claude-code@latest says Cask 'claude-code@latest' is not installed, run brew list --cask | grep claude-code and upgrade the cask it prints. An older version than expected right after brew install usually means a stale cask index: run brew update first. A newly launched model can need a version newer than stable serves; switch to latest to use it right away.
4. A minimumVersion or managed version range is in play. minimumVersion is a floor: background updates and claude update refuse to install anything below it. Claude Code writes it for you when you switch from latest to stable in /config and choose to stay on your current version, and clears it when you switch back to latest. In an organization, the managed settings requiredMinimumVersion and requiredMaximumVersion make Claude Code refuse to start outside a version range, and updates skip versions above the ceiling. If your company set a ceiling, staying below it is the intended behavior; ask your admin.
5. Something switched updates off. Check your shell profile and the env block of every settings file (user, project, local and managed) for three variables. DISABLE_AUTOUPDATER=1 stops background updates only; claude update and claude install still work. DISABLE_UPDATES=1 blocks every update path, including manual claude update and claude install; teams that ship Claude Code through their own channel set it. CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC disables nonessential network traffic, and auto-updates are part of that; setting it to 0 or false still disables it, so unset the variable instead. On a native or npm install, claude doctor shows which variable turned auto-updates off.
6. Two installs, and the updated one isn't the one you run. An npm global install, a legacy ~/.claude/local/ install, Homebrew and the native installer can all sit on your PATH at once. Updating one leaves claude pointing at another. Run which -a claude (Windows: where.exe claude), plus ls -la ~/.local/bin/claude, ls -la ~/.claude/local/ and npm -g ls @anthropic-ai/claude-code. Keep one, ideally the native install, and remove the rest (npm uninstall -g @anthropic-ai/claude-code, rm -rf ~/.claude/local). The command not found guide walks through the cleanup for each method.
7. npm can't write its global folder. If the npm global directory isn't writable, an npm install can't auto-update: Claude Code shows a one-time notice at startup and claude doctor lists the available fixes. Don't use sudo npm install -g; Anthropic warns it causes permission issues and security risks. The documented fix for npm permission errors is to switch to the native installer (curl -fsSL https://claude.ai/install.sh | bash) and then remove the npm copy (cause 6). If you stay on npm, upgrade with npm install -g @anthropic-ai/claude-code@latest, not npm update -g, which respects the original semver range and may not move you to the newest release. npm error code ENOTEMPTY during an update means a leftover folder: delete the directory named on the npm error path line and any .claude-code-* folders next to it (rm -rf "$(npm root -g)/@anthropic-ai/claude-code" and rm -rf "$(npm root -g)/@anthropic-ai/.claude-code-"*), then reinstall.
8. You replaced the native launcher. On macOS and Linux the native installer manages ~/.local/bin/claude as a symlink into ~/.local/share/claude/versions/. If you swapped it for your own script or symlink, updates still install new versions under versions/, but your launcher decides which one runs, and Claude Code keeps every installed version on disk. claude doctor reports a launcher the installer didn't create. To hand control back, remove ~/.local/bin/claude and run claude update. If native-install folders aren't writable (~/.local/bin, ~/.local/share/claude, ~/.claude), check with test -w ~/.local/bin && echo writable, and fix ownership with sudo mkdir -p ~/.local/bin and sudo chown -R $(whoami) ~/.local.
9. The download dropped or timed out. The connection dropped while downloading the update (attempt 3/3: ...) means the connection to the download server closed and three attempts didn't recover; Download timed out: exceeded the total deadline means the download didn't finish within 10 minutes. Run claude update again, ideally on a faster network. Test the host with curl -sI https://downloads.claude.ai/claude-code-releases/latest (Windows: curl.exe -sI ...): 200 means reachable, 403 usually means a proxy or filter, and no output means your network blocks it. Behind a corporate proxy, set HTTPS_PROXY (and HTTP_PROXY) before running claude update, and ask your network team to allow the full download from downloads.claude.ai; proxies sometimes cut off large downloads. Our proxy and SSL certificate errors guide covers the rest of the proxy setup.
10. Release verification failed. Claude Code couldn't confirm the release was genuine, so it installed nothing and your current version keeps working. If the reason in parentheses starts with sidecar_fetch_, run the same command again from your shell. For any other reason, try again later. If it keeps happening, report it with the full message.
11. claude update hangs after Checking for updates. Before v2.1.214, claude update and claude doctor hung when one of your shell config paths (~/.zshrc, ~/.bashrc, ~/.config/fish/config.fish, or on macOS ~/.bash_profile, ~/.bash_login, ~/.profile) was a directory instead of a file. Find it with ls -ld ~/.zshrc ~/.bashrc ~/.bash_profile ~/.bash_login ~/.profile ~/.config/fish/config.fish (a line starting with d is the culprit) and move it aside. Since claude update itself hangs on those versions, update by rerunning the install script instead.
12. Windows and WSL quirks. On Windows, Claude Code updates by renaming claude.exe to a backup and moving the new one in. If that fails, %USERPROFILE%\.local\bin can be left with only claude.exe.old.<timestamp>. Restore it in PowerShell with Get-ChildItem "$env:USERPROFILE\.local\bin\claude.exe.old.*" | Sort-Object Name | Select-Object -Last 1 | Rename-Item -NewName claude.exe, or rerun irm https://claude.ai/install.ps1 | iex if there's no backup. In WSL, install, run and update Claude Code inside the WSL terminal, not from PowerShell or CMD. If you used npm inside WSL and it reports a platform mismatch, WSL is picking up the Windows npm: run npm config set os linux, then npm install -g @anthropic-ai/claude-code --force (no sudo). which npm and which node paths starting with /mnt/c/ mean you're using Windows Node; install Node inside Linux with your package manager or nvm.

Staying on a version on purpose

Sometimes you want the opposite: hold a version that works while a new release settles.

• Follow stable instead of latest: /config → Auto-update channel, or "autoUpdatesChannel": "stable" in settings.json.
• Install an exact version: claude install 2.1.89 (or curl -fsSL https://claude.ai/install.sh | bash -s 2.1.89; PowerShell: & ([scriptblock]::Create((irm https://claude.ai/install.ps1))) 2.1.89). claude --version should then print 2.1.89 (Claude Code).
• Then keep it there: add "env": { "DISABLE_AUTOUPDATER": "1" } to settings.json so background updates don't move you forward. Remember to remove it later, or you'll be back at cause 5.

If claude isn't found at all after an update or reinstall, see Claude Code command not found. If the update worked but you now get errors on every turn, Claude Code API errors and Claude Code stuck or not responding cover the usual causes.

Facts on this page come from Anthropic's Claude Code docs on advanced setup and updates, troubleshooting installation and login, the CLI reference, environment variables and the settings reference. This guide isn't affiliated with Anthropic.