---
title: npm-update
section: 1
description: Update packages
---
### Synopsis
<!-- AUTOGENERATED USAGE DESCRIPTIONS -->
### Description
This command will update all the packages listed to the latest version
(specified by the [`tag` config](/using-npm/config#tag)), respecting the semver
constraints of both your package and its dependencies (if they also require the
same package).
It will also install missing packages.
If the `-g` flag is specified, this command will update globally installed
packages.
If no package name is specified, all packages in the specified location (global
or local) will be updated.
Note that by default `npm update` will not update the semver values of direct
dependencies in your project `package.json`, if you want to also update
values in `package.json` you can run: `npm update --save` (or add the
`save=true` option to a [configuration file](/configuring-npm/npmrc)
to make that the default behavior).
### Example
For the examples below, assume that the current package is `app` and it depends
on dependencies, `dep1` (`dep2`, .. etc.). The published versions of `dep1`
are:
```json
{
"dist-tags": { "latest": "1.2.2" },
"versions": [
"1.2.2",
"1.2.1",
"1.2.0",
"1.1.2",
"1.1.1",
"1.0.0",
"0.4.1",
"0.4.0",
"0.2.0"
]
}
```
#### Caret Dependencies
If `app`'s `package.json` contains:
```json
"dependencies": {
"dep1": "^1.1.1"
}
```
Then `npm update` will install `dep1@1.2.2`, because `1.2.2` is `latest` and
`1.2.2` satisfies `^1.1.1`.
#### Tilde Dependencies
However, if `app`'s `package.json` contains:
```json
"dependencies": {
"dep1": "~1.1.1"
}
```
In this case, running `npm update` will install `dep1@1.1.2`. Even though the
`latest` tag points to `1.2.2`, this version do not satisfy `~1.1.1`, which is
equivalent to `>=1.1.1 <1.2.0`. So the highest-sorting version that satisfies
`~1.1.1` is used, which is `1.1.2`.
#### Caret Dependencies below 1.0.0
Suppose `app` has a caret dependency on a version below `1.0.0`, for example:
```json
"dependencies": {
"dep1": "^0.2.0"
}
```
`npm update` will install `dep1@0.2.0`, because there are no other
versions which satisfy `^0.2.0`.
If the dependence were on `^0.4.0`:
```json
"dependencies": {
"dep1": "^0.4.0"
}
```
Then `npm update` will install `dep1@0.4.1`, because that is the highest-sorting
version that satisfies `^0.4.0` (`>= 0.4.0 <0.5.0`)
#### Subdependencies
Suppose your app now also has a dependency on `dep2`
```json
{
"name": "my-app",
"dependencies": {
"dep1": "^1.0.0",
"dep2": "1.0.0"
}
}
```
and `dep2` itself depends on this limited range of `dep1`
```json
{
"name": "dep2",
"dependencies": {
"dep1": "~1.1.1"
}
}
```
Then `npm update` will install `dep1@1.1.2` because that is the highest
version that `dep2` allows. npm will prioritize having a single version
of `dep1` in your tree rather than two when that single version can
satisfy the semver requirements of multiple dependencies in your tree.
In this case if you really did need your package to use a newer version
you would need to use `npm install`.
#### Updating Globally-Installed Packages
`npm update -g` will apply the `update` action to each globally installed
package that is `outdated` -- that is, has a version that is different from
`wanted`.
Note: Globally installed packages are treated as if they are installed with a
caret semver range specified. So if you require to update to `latest` you may
need to run `npm install -g [<pkg>...]`
NOTE: If a package has been upgraded to a version newer than `latest`, it will
be _downgraded_.
### Configuration
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### See Also
* [npm install](/commands/npm-install)
* [npm outdated](/commands/npm-outdated)
* [npm shrinkwrap](/commands/npm-shrinkwrap)
* [npm registry](/using-npm/registry)
* [npm folders](/configuring-npm/folders)
* [npm ls](/commands/npm-ls)
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