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cant install react-navigation using npm [duplicate]

When trying to install the npm packages using npm i command, I am getting the following exception:
I have tried reinstalling the Node.js package and setting the proxy to off using:
set HTTP_PROXY=
set HTTPS_PROXY=
The issue is still there. What I am doing wrong?
Update:
When I run the following command:
npm install --legacy-peer-deps
The following error is displayed:

This is not related to an HTTP proxy.
You have dependency conflict (incorrect and potentially broken dependency) as it says, so try to run the command with --force, or --legacy-peer-deps. If it doesn't take effect, the temporary solution is using prior versions of the Node.js (downgrading the Node.js version) as it causes this kind of errors to happen sometimes.
Update based on the OP's update:
As you see, it fires the following error:
No matching version found for #angular/http#^9.1.4.
Take a look at angular/http page. Note that the latest version for that deprecated package is 7.2.16 while you request an upper version (e.g., ^9.1.4)! So, try to check the project dependencies and follow the raised errors in order to solve the problem.

Try this command-
npm install --save --legacy-peer-deps

First to understand the problem. Here is what I have as error:
npm ERR! ERESOLVE unable to resolve dependency tree
npm ERR!
npm ERR! While resolving: project-admin#11.0.0
npm ERR! Found: #angular/common#11.0.3
npm ERR! node_modules/#angular/common
npm ERR! #angular/common#"11.0.3" from the root project
npm ERR!
npm ERR! Could not resolve dependency:
npm ERR! peer #angular/common#"^9.1.0 || ^10.0.0" from #agm/core#3.0.0-beta.0
npm ERR! node_modules/#agm/core
npm ERR! #agm/core#"3.0.0-beta.0" from the root project
First you should start to read the problem from the bottom to the top. Here #agm/core#3.0.0-beta.0 requires angular common 9.1.0 or 10.0.0. And the top message says that the angular common found is actually 11.0.3.
(If you want to understand dependencies little bit better, here is very simple site: How npm3 Works)
dependencies — these are the essential dependencies that you rely on and call in your project’s code
devDependencies — these are your development dependencies, for example, a prettier library for formatting code
peerDependencies — if you set a peer dependency in your package.json, you are telling the person who installs your package that they need that dependency with the specified version
optionalDependencies — these dependencies are optional and failing to install them will not break the installation process
bundledDependencies — it’s an array of packages that will come bundled with your package. This is useful when some 3rd party library is not on NPM, or you want to include some of your projects as modules
So what should be the solution then? The problem is about peer dependencies. The solution is to downgrade angular common or the solution is to use legacy dependencies logic for installing packages using --legacy-peer-deps. So --legacy-peer-deps does not try to install the peerDependencies automatically. Is this going to work for you? Probably, yes. But you should add specific instructions how to do that, or to make the use of --legacy-peer-deps automatic for future installation of the project packages with this code from one of the previous answers:
npm config set legacy-peer-deps true
In my case I installed the package and I tried to run ng serve, but because --legacy-peer-deps was used, there were dependency packages which were not installed. I had to install those manually (because I did not set the configuration from the code above). At the end installing about five packages manually, all with --legacy-peer-deps, I ended to a package that could not be installed and I did not try to continue, because my project was throwing warnings like crazy and there were a lot of packages for audit too. So my decision was not to use this package and to find an alternative.
Other solutions that I read about along the way:
downgrade Node.js to v14. This will downgrade npm. It might not be v14, but this was the version that was most widely downgraded to.
Some people use Yarn to force package installation - personally I don't understand how this works, because I haven't used Yarn.
downgrading Angular and the global Angular CLI version to version that will satisfy the requirement. In my case it is angular/common, and in the question it's angular/core, but both require downgrading the whole angular right (I am not sure about this here).
the package you install might have a higher version that doesn't require downgrading Angular. You might try to use the https://updatepackagejson.com/ to upgrade your packages to the latest, but this is in case your project is quite new.

In addition to using the --legacy-peer-deps command line option, this can also be set more permanently as a config option:
npm config set legacy-peer-deps true

Finally, I found the answer. Try this command -
npm install --save --legacy-peer-deps
Described here legacy-peer-deps

When using npm 7, this comes up a lot because peer dependencies issues are treated as errors in version 7 whereas they were generally only warnings in version 6. Usually using --legacy-peer-deps makes it work with npm 7.
When that doesn't work, an option is to downgrade to npm 6. Downgrading Node.js is not necessary (but not harmful either). The relevant dependency management code is in npm. Downgrading Node.js will often work coincidentally because doing so will often downgrade npm as well.
Another option that is less disruptive than downgrading npm is using npx to use the previous version of npm for just the install command: npx -p npm#6 npm install
And when all else fails, it's often worth a shot to remove the node_modules directory and package-lock.json, and then run npm install again. That regenerates node_modules and package-lock.json.

This happens for some packages after updating to npm 7.
Parameter --legacy-peer-deps can help:
npm i --legacy-peer-deps
Described here legacy-peer-deps
Causes npm to completely ignore peerDependencies when building a
package tree, as in npm versions 3 through 6.
If a package cannot be installed because of overly strict
peerDependencies that collide, it provides a way to move forward
resolving the situation.
...
You can set this option to true by default (not recommended by npm):
npm config set legacy-peer-deps true
Or just wait until these packages get up to date.

Just do two simple steps:
First, execute this in your terminal.
npm config set legacy-peer-deps true
Second, clear the cache:
npm cache clean --force
And finally, execute your command. This will work for sure.

The problem is related to a dependency conflict or broken dependency. You can proceed by accepting the incorrection of dependency by forcing an install.
Solution: Using command with --force.
Your command will be like npm install --force #your-npm-package.
Note: You can use yarn to install a dependency if it's available in to install with the yarn package manager.

NPM can be used to install and manage versions of dependencies in your projects.
I had it the same issue on React versions in relation with the npm version:
npm error found types/react#16.14.20
So it might be package-versions that need to be installed based on your package.json file.
It gives errors in the npm 7 version and cannot install Node.js modules.
If you will downgrade npm version to 6, those problems will become warnings and the problem will be resolved.
Try to prove this command: npm install -g npm#6
Check if version is already installed: npm --version
Remove and install node_modules package:
a) Remove rm -rf node_modules
b) Install: npm i

Try removing the node modules and package-lock.json file and run command npm install
or
Try npm cache clean --force

First I tried
npm install
It gave me error unable to resolve dependency tree and based on the help information from this command,
Fix the upstream dependency conflict, or retry
npm ERR! this command with --force, or --legacy-peer-deps
npm ERR! to accept an incorrect (and potentially broken) dependency resolution.
I tried this command:
npm install --legacy-peer-deps
And it solved my problem.

Try two options to resolve this issue:
Option 1: Delete folder node_modules folder and file package_lock.json after running:
npm cache clean --force after npm i --force
Option 2: run npm install --save --legacy-peer-deps

The fastest solution: npm install --legacy-peer-deps
Explanation:
In npm versions 3 through 6, peerDependencies were not automatically installed, and would raise a warning if an invalid version of the peer dependency was found in the tree. As of npm v7, peerDependencies are installed by default.
npm docs: peerDependencies
Your dependency contains some peerDependencies that conflict with the root project's dependency.
As it described in the npm ERR log.

Disclaimer: This assumes you're on npm v7
Note: If you follow the instructions of sibling commenters, it will create a user-scoped config that won't sync consistently across teammates / machines / buildbots.
Project-based legacy peer dependencies
You will probably want legacy-peer-deps tied to your project so it proliferates across machines / developers, and doesn't contaminate your other projects.
npm config set legacy-peer-deps true --location project
This will create a local file at .npmrc which you can commit to your repository:
legacy-peer-deps=true
Then afterwards, you can just run:
npm install
Then commit the updated lockfile.
Remember, location, location, location:
per-project configuration (/path/to/my/project/.npmrc, see more):
npm config set legacy-peer-deps true --location project
per-user configuration (defaults to $HOME/.npmrc, see more)
npm config set legacy-peer-deps true --location user
or, as the default location is user anyway:
npm config set legacy-peer-deps true
global configuration (defalts to $PREFIX/etc/npmrc, see more)
npm config set legacy-peer-deps true --location global
or, as --global infers --location global
npm config set legacy-peer-deps true --global
For some projects, fixing dependencies may be non-trivial
In my case, a critical dependency we have a legacy version of wants to pull in webpack v3 (!) - but that's a build dependency of that project's.
The best solution on a short term basis is to use legacy-peer-deps as a hold over.
If you are in a pinch, you could also consider forking the dependency and adjusting its peer dependencies accordingly - them point your project to the fork.

You can install the packages using two ways it is showing this error
ERESOLVE unable to resolve dependency tree
Install the package using npm install and having --legacy-peer-deps
npm install --save --legacy-peer-deps
This is a combination of two commands
a. Set legacy-peer-deps true in npm config
npm config set legacy-peer-deps true
b. Now install packages using npm install
npm install

The problem seems to be that gf-kautomata-pipeline-ui is using Angular 9, while #angular/http requires Angular 7. (#angular/http was deprecated and eventually removed, and all its functionality was moved into #angular/common instead.)
See: https://www.npmjs.com/package/#angular/http
If you're running Angular 9, then
delete #angular/http from your package.json (You don't need it in Angular 9)
Make sure you have #angular/common in your package.json.
Run npm i.
If you're running Angular 7, then open up your package.json and check to make sure all of your Angular packages are no higher than ^7.0.0. You may also need remove gf-kautomata-pipeline-ui, or contact the author of gf-kautomata-pipeline-ui and find out if the library is compatible with Angular 7.

This works for me:
npm install --save --legacy-peer-deps

In my case, I started getting the error (below) after upgrading npm from version 6 to 7.
npm ERR! code ERESOLVE npm ERR! ERESOLVE unable to resolve dependency
tree
...
npm ERR! Fix the upstream dependency conflict, or retry this command with --force, or --legacy-peer-deps to accept an incorrect (and potentially broken) dependency resolution.
In my case compiling with either --legacy-peer-deps or --force flags resulted in a useless bundle.
So I tried deleting the node_modules, package-lock.json, and bundle using yarn install. This generated a yarn.lock file and created package-lock.json that worked fine in subsequent npm runs.
P.S.: I am using the temporary workaround until npm 7 works fine with my project: after that, I will delete yarn.lock, package-lock.json and folder node_modules, and recompile with npm
rm -rf node_modules
rm package-lock.json
yarn install
# Generates a yarn.lock file and a new package-lock.json
# Continue with npm
npm start

I just update my Node.js and it works for me:
node -v
Output:
V xxxx
And:
sudo npm install -g n
(Use this command to install the stable node release.)
sudo n stable

If you have node_modules folder and package-lock.json file in your root directory then remove those:
rm -r node_modules
rm package-lock.json
Then run commands:
npm install --save --legacy-peer-deps
npm audit fix --force
Create .env file in the root directory and paste below code:
SKIP_PREFLIGHT_CHECK=true
Now, start your project:
npm start

I have faced this issue many times. At last I found a solution:
npm install react-native-paper --legacy-peer-deps

Use
npm install --legacy-peer-deps
This worked for me.

For this case, I was having the issue
ERESOLVE unable to resolve dependency tree
in an Angular 13 project that used some packages from a private npm feed in Azure DevOps.
To access this repository, I created an .npmrc file. Because of this, the npm install command would search all packages in my private repository and not in npm feed any more. The unable to resolve the dependency tree error happened because the npm install command could not find many of the packages that were hosted in the npm feed and not my private feed.
I found this amazing answer on how to scope packages.
Based on this, I made some changes:
In my library Package.json, update the name to have a scope name #mylib
"name": "#myLib/command-queue",
Build and publish this package to my private feed
In my client app (the one that uses this package), update the .npmrc file to use my private feed for packages in this scope only
#myLib:registry=https://pkgs.dev.azure.com/...
always-auth=true
Now, whenever I run the command npm install, if the package has the scope #myLib, it will look for it in my private feed, and use the npm feed for all other cases (i.e., #angular/...)
This is an example of my client app Package.json file:
"#angular/platform-browser-dynamic": "~13.3.0",
"#angular/router": "~13.3.0", <-- this comes from npm
"#myLib/jcg-command-queue": "^2.2.0", <-- This comes from my private feed
Also, with this change, there isn't any need to add --legacy-peer-deps to the npm install command any more.

We had the same issue resulting in the error bellow:
npm ERR! code ERESOLVE npm
ERR! ERESOLVE could not resolve npm
ERR!
npm ERR! While resolving: #angular/material-moment-adapter#12.1.4 npm
ERR! Found: #angular/material#12.0.6 npm ERR!
node_modules/#angular/material npm ERR! #angular/material#"~12.0.4"
from the root project
...
We use npm ci for clean install in Azure-Pipelines.
The issue was very often, that package.json and package-lock.json were not in sync anymore.
Solution to it was to execute npm install local and push the new package-lock.json.
As and additional hint we added a new task in the pipeline for additional informations if the the job fails.
- task: Npm#1
displayName: npm install
inputs:
command: custom
customCommand: ci
customRegistry: useNpmrc
# ##vso[task.logissue type=error] writes the text to the summary page (error-log).
- bash: echo "##vso[task.logissue type=error] If 'npm install' fails with 'ERESOLVE could not resolve', 'package.json' and 'package-lock.json' (needed for 'npm ci') may be out of sync. Run 'npm install' locally and push the new package-lock.json."
condition: failed() # Only execute on fail
displayName: npm install failed hint

Resetting package-lock.json works good for me all the time:
git checkout -- package-lock.json
Details:
Been experiencing this a lot when updating all packages of the legacy project - I highly don't recommend using npm audit fix nor npm i --force. Deleting the package-lock.json didn't work for me all the time as well. Rollback to the working version of package.json + package-lock.json and add packages turned out to be the safest and fastest variant for me.

Just in case, I did have similar behavior, when I tried either npm upgrade my current Angular 11.x based boilerplate from previous ng new or create new ng new abc based on Angular 12.x. I simply forgot to upgrade Angular CLI. So this npm install -g #angular/cli#latest solved my errors during ng new abc.

In my case I was having trouble with a #babel/core dependency, but I didn't want to use --force, because I was not sure about the consequences, so I went to https://www.npmjs.com/, looked for the package and replaced my old version with the newest one. That did the work.

This is an issue of Node.js version. Some latest versions of Node.js could show errors like these.
https://github.com/nvm-sh/nvm
I use NVM to manage Node.js versions on the system and use Node.js 12 to get past this error.
Command to change version:
nvm use 12

Downgrade Node.js to v14 works for me.
Use these commands:
source ~/.bash_profile
nvm use v14.16.1
npm install

Fix the upstream dependency conflict installing NPM packages

I am trying to npm install vue-mapbox mapbox-gl, and I'm getting a dependency tree error.
I'm running Nuxt.js SSR with Vuetify and haven't installed anything related to Mapbox prior to running this install and am getting this error.
38 error code ERESOLVE
39 error ERESOLVE unable to resolve dependency tree
40 error
41 error While resolving: [1mexample[22m#[1m1.0.0[22m
41 error Found: [1mmapbox-gl[22m#[1m1.13.0[22m[2m[22m
41 error [2mnode_modules/mapbox-gl[22m
41 error [1mmapbox-gl[22m#"[1m^1.13.0[22m" from the root project
41 error
41 error Could not resolve dependency:
41 error [35mpeer[39m [1mmapbox-gl[22m#"[1m^0.53.0[22m" from [1mvue-mapbox[22m#[1m0.4.1[22m[2m[22m
41 error [2mnode_modules/vue-mapbox[22m
41 error [1mvue-mapbox[22m#"[1m*[22m" from the root project
41 error
41 error Fix the upstream dependency conflict, or retry
41 error this command with --force, or --legacy-peer-deps
41 error to accept an incorrect (and potentially broken) dependency resolution.
41 error
41 error See /Users/user/.npm/eresolve-report.txt for a full report.
42 verbose exit 1
What's the right way to go about fixing this upstream dependency conflict?

It looks like it's a problem with peer dependencies in the latest version of npm (v7) which is still a beta version.
Try with npm install --legacy-peer-deps. For detailed information check the blog post npm v7 Series - Beta Release! And: SemVer-Major Changes in npm v7.

Use --legacy-peer-deps after npm install. For example, if you want to install Radium, use:
npm install --legacy-peer-deps --save radium

There are two ways:
use npm install --legacy-peer-deps to install, and if this doesn't work use
the force method. Add --force next to npm install: npm install --force

You can follow these commands
First type:
npm config set legacy-peer-deps true
Then type:
npx create-react-app my-app

Your dependency mexample requires mmapbox-gl v1.13.0 and mvue-mapbox requires mmapbox-gl v0.53.0.
NPM doesn't know which version to install, so it gives a warning. You can bypass the errors using -- force or --legacy-peer-deps, but you are ignoring an error, and making unexpected results.
Production Options:
Probably one of your packages is outdated. Upgrading packages and fixing upgrade errors might fix the dependency conflict.
Overriding a dependency manually to avoid the warning and error. You are setting the version to a specific one that you know that works. Usually the newer version.
Example solution with override. Your package.json file will look like this:
{
"name": "my-app",
"version": "0.1.0",
"private": true,
"dependencies": {
"mexample": "^1.2.0",
"vue-mapbox": "*"
},
"scripts": {
"start": "react-scripts start",
"build": "react-scripts build",
"test": "react-scripts test",
"eject": "react-scripts eject"
},
"overrides": {
"mmapbox-gl": "1.13.0"
}
}
The last option is bypassing using either:
--legacy-peer-deps completely ignores all peerDependencies using the newest version without pinning on file package-lock.json
--force forces the use of the newest, pinning all the versions on package-lock.json
Extra: You shouldn't use "*" as a version, because it might update major and break dependencies.

Until npm version 7.19.1, it still had the same issue. After upgrading to version 7.20.3, use command npm install -g npm#latest and npm audit fix. All packages will be fixed without error.

I tried multiple ways, but nothing was working for me. At last I tried this and it worked:
npm config set legacy-peer-deps true
Run this in the project folder and then try to install any package. It might work for you as well.

To solve it, fix the upstream dependency conflict installing NPM packages error
Method 1. Just use --legacy-peer-deps after npm install.
For example, if you want to install Axios, use
npm install --legacy-peer-deps --save axios.
Method 2. Updating npm and 'audit fix'
npm I -g npm#latest
npm audit fix --force
Method 3. Using --force to install packages
npm install axios --force

I was stuck on this issue for long which also makes error from other commands which calls for some install commands that was breaking.
The only solution that works (maybe suppresses the error) is
npm config set legacy-peer-deps true
This will set the configuration of legacy-peer-deps to true

To resolve npm dependencies and conflicts with npm packages, use npm-check-updates.

Almost all answers here suggest using force or legacy-peer-deps. Though this will technically work, please note that this is not recommended by NPM if you can avoid it anymore (source). Some folks may not have a choice, but I was able to resolve my dependency conflicts by deleting node-modules and package-lock.json then manually updating packages to their latest version one at a time until it stopped complaining (packages mentioned in the error messages after running npm i. Not a great or clean solution, but at least my packages are up-to-date and I'm not ignoring errors or using legacy solutions.

A lot of upvotes for using --legacy-peer-deps, but if --force works, I would recommend using that since it still pins many dependency versions while --legacy-peer-deps ignores peer dependencies entirely. See the example below:
npm: When to use --force and --legacy-peer-deps
I started getting this error on Azure DevOps a few days ago. I initially thought it was a glitch on the Azure side, but since it continued, we started looking into it a bit more.
It turns out the agent we are using, windows-2022, was updated a few days ago:
Updating readme file for win22 version 20220607.3 (#5713)
Node and NPM now match the latest Node.js LTS version: 16.15.1 (includes npm 8.11.0)
Downloads
You can view all agents-included software on Microsoft-hosted agents, Software.
After reading on Microsoft Visual Studio Developer Community, they recommend downgrading Node.js using Node.js Tool Installer task like this:
- task: NodeTool#0
inputs:
versionSpec: '16.14.2'
Node.js Tool Installer task
npm install fails in Azure DevOps Hosted Agent
However, we decided that we do not want to downgrade Node.js, so the first step was matching Node.js locally with LTS version 16.15.1 and npm 8.11.0.
When running npm ci, we then got the same error locally.
We tried npm ci --force and we then got this error:
npm ci can only install packages when your package.json and
package-lock.json or npm-shrinkwrap.json are in sync. Please update
your lock file with npm install before continuing.
npm install gave the same error even after node_modules was manually removed, but npm install --force worked, and it generated a new package-lock.json file.
npm ci still failed with the same error, but running npm ci --force worked. We decided to update Azure DevOps .yml to include --force and checked in the new package-lock.json file. After doing this, everything worked like before and we could now update our packages one by one.

delete the package-lock.json file
modify the package.json file, updating the version as indicated by the peer dependency
Add a tilde or caret for allowing install latest version and resolving dependency issues, for example :
~1.0.2 means to install version 1.0.2 or the latest patch version such as 1.0.4.
^1.0.2 means to install version 1.0.2 or the latest minor or patch version such as 1.1.0.
run npm install or npm udpate

I resolved this by adding
steps:
- task: NodeTool#0
inputs:
versionSpec: '12.x'

Nothing here worked for me.
After struggling with this issue for so long, I found a solution that worked.
Apparently I had some packages installed globally.
Listed them with:
npm list -g --depth=0
Then removed the unwanted packages with:
npm uninstall -g <package-name>
Finally I got the problem fixed

webpack-cli#3.0.8 requires a peer of webpack#^4.x.x but none is installed

Having a little trouble with React. Does anyone know how I can install the peer of webpack#^4.x.x?
This is the error I am recieving when I try to run
webpack-dev-server
in cmd. It just returns
webpack-cli#3.0.8 requires a peer of webpack#^4.x.x but none is installed. You must install peer dependencies yourself.

webpack-dev-server has Webpack as a peer dependency, which means that you are responsible for installing that yourself.
You could install the latest version of Webpack and add it to your devDependencies with the following command:
npm i -D webpack#latest
By writing webpack-dev-server you are also trying to use the globally installed version of that package. You can use the locally installed one instead by adding it to a script in your package.json:
{
"scripts" : {
"start": "webpack-dev-server"
}
}

If you need webpack updated globally to the latest version, you can run:
npm install -g webpack

npm install the exact package version specified in package.json

Currently, If I run npm install, it installs the updated version of already installed packages. How can I install the exact version as specified in the package.json file?

By default npm installs packages using ^ which means any version in the same major range, you can switch this behaviour by using --save-exact
// npm
npm install --save --save-exact react
// yarn
yarn add --exact react
I created a blog post about this if anyone is looking for this in the future.
https://www.dalejefferson.com/articles/2018-02-04-how-to-save-exact-npm-package-versions/

That behavior is really driven by the one specifying the versions in the package.json. If the version number looks like "1.0.0", without any other symbols, the exact version (1.0.0) should be installed.
So what you could do is simply modify the package.json and run a npm install then. Be sure to clear out the node_modules directory before you do that.
https://docs.npmjs.com/files/package.json#dependencies

You can also open package.json and change value for the package you want to remain exact. From "vue": "^2.6.10" to "vue": "2.6.10". Notice the lack of ^ sign in front of the version number.

How to set package latest version in Bower?

I was watching this nice video about requirejs, backbone and bower and something does not work for me. How can I set latest version of package in bower.json file? In video Jeff says that null should be used to define latest version like this
{
"name": "project name",
"version": "1.0.0",
"dependencies": {
"backbone-amd": null,
"underscore-amd": null,
"requirejs": null
}
}
But I have an exception in console that I can't use null value as version number. I couldn't find any info at bower wiki. Does anybody know how to solve this?

If you are using bower version 1.2.x, this should work:
{
"name": "project name",
"version": "1.0.0",
"dependencies": {
"backbone-amd": "latest",
"underscore-amd": "latest",
"requirejs": "latest"
}
}

You can use the latest keyword when installing a package. Be aware that you can get some dependencies issues :
bower install --save font-awesome#latest
bower font-awesome#4.1.0 not-cached git://github.com/FortAwesome/Font-Awesome.git#4.1.0
bower font-awesome#4.1.0 resolve git://github.com/FortAwesome/Font-Awesome.git#4.1.0
bower font-awesome#4.1.0 download https://github.com/FortAwesome/Font-Awesome/archive/v4.1.0.tar.gz
bower font-awesome#4.1.0 extract archive.tar.gz
bower font-awesome#4.1.0 resolved git://github.com/FortAwesome/Font-Awesome.git#4.1.0
There is a -F flag that can go even further:
-F, --force-latest Force latest version on conflict

I have found an easy alternative, instead of updating manually, you could use one command:
First install this:
npm install -g bower-check-updates
Then run the bcu to check for the updates
After check, bcu -u to upgrade your bower.json and its done!
More details and source:
bower-check-updates - is totally clone of npm-check-updates, but it
updates bower.json dependencies (bower-check-updates updates
bower.json).
Source: https://www.npmjs.com/package/bower-check-updates

That should work.
Make sure you are running the latest version of Bower. I am currently running v1.2.6 and null works to fetch the latest dependency.
$ bower -v
If you have installed bower globally via npm, then you can update it this way:
$ npm update bower -g
Note: you may need to run that as sudo depending on your file permissions.
Hope this helps.

npm install -g npm-check-updates
npm-check-updates --packageManager bower
source: https://www.npmjs.com/package/bower-check-updates