How to fix npm ERR! code EVERSIONMISMATCH npm ERR! npm version mismatch in npm

npmINTERMEDIATEHIGHUpdated Dec 5, 2025· 230 views

Version mismatch errors occur when npm cannot resolve conflicting version requirements across your project dependencies. Use --legacy-peer-deps flag or update packages to compatible versions.

Quick fix

Fixes EVERSIONMISMATCH

# Remove node_modules and lockfile
rm -rf node_modules
rm package-lock.json

# Clear npm cache
npm cache clean --force

# Reinstall all dependencies
npm install
  1. Clear npm cache and reinstall dependencies
  2. Check and match your Node.js version
  3. Use --legacy-peer-deps flag for immediate relief
  4. Update conflicting packages to compatible versions
npm — error
# Remove node_modules and lockfile
rm -rf node_modules
rm package-lock.json
# Clear npm cache
npm cache clean --force
# Reinstall all dependencies
npm install
npm ERR! code EVERSIONMISMATCH
npm ERR! npm version mismatch

What this error means

Version mismatch errors occur when npm cannot resolve conflicting version requirements across your project dependencies. This happens when two or more packages in your dependency tree require incompatible versions of the same library—for example, Package A needs React 16 while Package B needs React 18. Starting with npm v7, npm strictly enforces these conflicts and will fail installation rather than silently installing conflicting versions. The error indicates a breakdown in dependency resolution, preventing npm from installing a consistent set of packages.

Typical symptoms

  • npm install fails with error messages mentioning conflicting version requirements
  • Installation succeeds partially but some packages don't work together
  • After updating Node.js or npm version, previously working projects fail to install
  • Native modules throw 'module version mismatch' errors at runtime
  • In monorepo/workspace setups, some workspaces have different dependency versions

Common causes

  1. Peer dependency conflicts introduced by upgrading to npm v7+, which enforces stricter version checking
  2. Node.js version mismatch with native modules compiled for a different Node.js major version
  3. Corrupted npm cache containing stale or partially installed package data
  4. Inconsistent dependency versions in monorepo workspaces
  5. Outdated or conflicting package-lock.json that doesn't match current package.json
  6. Global npm configuration or .npmrc settings preventing proper version resolution

How to fix "npm ERR! code EVERSIONMISMATCH npm ERR! npm version mismatch"

1Clear npm cache and reinstall dependencies

Start with a clean slate by removing cached packages and reinstalling:

bash
# Remove node_modules and lockfile
rm -rf node_modules
rm package-lock.json

# Clear npm cache
npm cache clean --force

# Reinstall all dependencies
npm install
2Check and match your Node.js version

Version mismatches often occur after updating Node.js. Verify your current version and match it to your project requirements:

bash
node --version
npm --version

If using nvm, check your .nvmrc file and switch to the correct version:

bash
# With nvm, this auto-switches if .nvmrc exists
nvm use

# Or specify explicitly
nvm install 18.17.0
nvm use 18.17.0
3Use --legacy-peer-deps flag for immediate relief

For npm v7+, add the --legacy-peer-deps flag to bypass strict peer dependency checking:

bash
npm install --legacy-peer-deps

Or make it permanent for your project by creating .npmrc:

bash
echo 'legacy-peer-deps=true' > .npmrc
npm install

Warning: This bypasses safety checks. Only use temporarily while resolving root causes.

4Update conflicting packages to compatible versions

Identify which packages are conflicting by examining the error output, then update them:

bash
# First, identify conflicts
npm ls

# Check available versions of a package
npm view react versions

# Update to a compatible version
npm install react@18.2.0
npm install react-dom@18.2.0
5Fix monorepo workspace version conflicts

In monorepo setups, ensure all workspaces use consistent dependency versions:

bash
# Check current workspace structure
npm ls --workspaces

# Install with workspace awareness
npm install --workspace-root

Edit your root package.json and individual workspace package.json files to use identical version ranges for shared dependencies.

6Last resort: Force install with --force flag

If nothing else works, force npm to ignore all conflicts (use cautiously):

bash
npm install --force

This is the most dangerous option as packages may not work correctly together. Use only when you understand the specific conflicts and have tested the result.

Advanced notes

Understanding npm's resolution algorithm is key: npm v7+ uses a more restrictive resolution that will fail if peer dependencies cannot be satisfied, while npm v6 would only warn. In monorepo environments, npm installs shared dependencies at the root level if versions match, but creates separate node_modules in individual workspaces if versions differ. For native modules like sqlite3 or bcrypt, version mismatches occur because the module is compiled for a specific Node.js version's ABI; switching Node versions requires recompilation via npm rebuild.

Frequently asked questions

What does "EVERSIONMISMATCH" mean?
Version mismatch errors occur when npm cannot resolve conflicting version requirements across your project dependencies. This happens when two or more packages in your dependency tree require incompatible versions of the same library—for example, Package A needs React 16 while Package B needs React 18. Starting with npm v7, npm strictly enforces these conflicts and will fail installation rather than silently installing conflicting versions.
How do I fix "EVERSIONMISMATCH"?
Version mismatch errors occur when npm cannot resolve conflicting version requirements across your project dependencies. Use --legacy-peer-deps flag or update packages to compatible versions.
What causes "EVERSIONMISMATCH"?
Peer dependency conflicts introduced by upgrading to npm v7+, which enforces stricter version checking Node.js version mismatch with native modules compiled for a different Node.js major version Corrupted npm cache containing stale or partially installed package data
Is the "EVERSIONMISMATCH" error serious?
Yes. This is a high-severity error that usually blocks work until it is fixed, but the steps above resolve it.

Official resources & further reading