When upgrading Angular 5 to 6, I get incompatible peer dependency (using ng update @angular/core)

I am trying to update my Angular app from v5 to v6 following this guide.

I have ran all these commands successfully:

npm install -g @angular/cli
npm install @angular/cli
ng update @angular/cli

The problem is that I get an error when running this command:

ng update @angular/core
                  Package "@angular/flex-layout" has an incompatible peer dependency to "rxjs" (requires "^5.5.0", would install "6.2.0").
                  Package "@angular/compiler-cli" has an incompatible peer dependency to "typescript" (requires ">=2.7.2 <2.8", would install "2.6.2")
Incompatible peer dependencies found. See above.

I am not sure how to handle this & I don't want to try things on my own to avoid breaking the app.

Can someone please advise what to do?

My current dependencies are as follows:

{
 ....
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "^5.2.10",
    "@angular/cdk": "^5.2.5",
    "@angular/common": "^5.2.10",
    "@angular/compiler": "^5.2.10",
    "@angular/core": "^5.2.10",
    "@angular/flex-layout": "^5.0.0-beta.14",
    "@angular/forms": "^5.2.10",
    "@angular/http": "^5.2.10",
    "@angular/material": "^5.2.5",
    "@angular/platform-browser": "^5.2.10",
    "@angular/platform-browser-dynamic": "^5.2.10",
    "@angular/router": "^5.2.10",
    "@ngx-translate/core": "^9.1.1",
    "@ngx-translate/http-loader": "^3.0.1",
    "core-js": "^2.5.5",
    "hammerjs": "^2.0.8",
    "primeng": "^5.2.4",
    "rxjs": "^5.5.11",
    "zone.js": "^0.8.26"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "~0.6.3",
    "@angular/cli": "^6.0.3",
    "@angular/compiler-cli": "^5.2.11",
    "@angular/language-service": "^5.2.10",
    "@types/jasmine": "~2.8.3",
    "@types/jasminewd2": "~2.0.2",
    "@types/node": "^6.0.106",
    "codelyzer": "^4.3.0",
    "jasmine-core": "~2.8.0",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "^2.0.2",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "^1.2.1",
    "karma-jasmine": "~1.1.0",
    "karma-jasmine-html-reporter": "^0.2.2",
    "protractor": "^5.3.2",
    "ts-node": "~4.1.0",
    "tslint": "~5.9.1",
    "typescript": "~2.6.2"
  }
}

A work around for this would be to add a --force flag.

ng update @angular/core --force

Hope this will help someone else, I finally could solve the issue by manually updating some of the angular packages (using npm)

npm i @angular/cdk@6 @angular/compiler-cli@6 @angular/material@6 rxjs@6 --save

After that the ng update command could work (with some warnings, but at least we passed the ng update @angular/core)

ng update @angular/core
    Updating package.json with dependency @angular/language-service @ "6.0.3" (was "5.2.10")...
    Updating package.json with dependency @angular/animations @ "6.0.3" (was "5.2.10")...
    Updating package.json with dependency @angular/forms @ "6.0.3" (was "5.2.10")...
    Updating package.json with dependency @angular/common @ "6.0.3" (was "5.2.10")...
    Updating package.json with dependency @angular/compiler @ "6.0.3" (was "5.2.10")...
    Updating package.json with dependency @angular/core @ "6.0.3" (was "5.2.10")...
    Updating package.json with dependency @angular/router @ "6.0.3" (was "5.2.10")...
    Updating package.json with dependency @angular/platform-browser-dynamic @ "6.0.3" (was "5.2.10")...
    Updating package.json with dependency @angular/platform-browser @ "6.0.3" (was "5.2.10")...
    Updating package.json with dependency @angular/http @ "6.0.3" (was "5.2.10")...
UPDATE package.json (1587 bytes)
npm WARN @angular/compiler-cli@6.0.3 requires a peer of typescript@>=2.7.2 <2.8 but none is installed. You must install peer dependencies yourself.
npm WARN @angular/flex-layout@5.0.0-beta.14 requires a peer of @angular/cdk@^5.0.0 but none is installed. You must install peer dependencies yourself.
npm WARN @angular/flex-layout@5.0.0-beta.14 requires a peer of @angular/core@^5.0.0 but none is installed. You must install peer dependencies yourself.
npm WARN @angular/flex-layout@5.0.0-beta.14 requires a peer of @angular/common@^5.0.0 but none is installed. You must install peer dependencies yourself.
npm WARN @angular/flex-layout@5.0.0-beta.14 requires a peer of rxjs@^5.5.0 but none is installed. You must install peer dependencies yourself.
npm WARN @ngtools/webpack@6.0.3 requires a peer of typescript@~2.4.0 || ~2.5.0 || ~2.6.0 || ~2.7.0 but none is installed. You must install peer dependencies yourself.
npm WARN @ngx-translate/http-loader@3.0.1 requires a peer of @ngx-translate/core@>=10.0.0 but none is installed. You must install peer dependencies yourself.
npm WARN tsickle@0.27.5 requires a peer of typescript@>=2.4.2 <2.8 but none is installed. You must install peer dependencies yourself.

updated 10 packages in 57.253s

The issue was solved for me after making a forced update like the following:-

ng update --all --force

It basically avoids/ignores all the dependency-checks and updates all the packages wherever applicable. Although it is not recommended generally, I had to do the update this way as other suggestions seemed to be not working for me.

I was able to get around messages about incompatible peers by using:

ng update --all

It updated all the packages that needed to be updated.

Running --force is not the right option. since it is complaining about rxjs and typescript, you need to upgrade that first. Once that's complete, you can run the angular update command

Don't force update, that will later present unexpected results. Use the following npm install instead and try again.

npm install -g @angular-devkit/schematics-cli

You can try:

npm i --save-dev @angular/cli@version @angular/core@version

Then you can run ng update --all This worked for me.

I got Incompatible peer dependencies found. See above. while updating @angular/cli and @angular/core using ng update --all.

this command worked in my case :

npm install --force @angular/cli@version @angular/core@version

here version could be 6,7,8,9,10 on which you to upgrade