'npm update' command is not working to update dependencies in Angular2

I want to update my outdated dependencies in Angular 2. When I run npm outdated, it displayed some outdated dependencies, but when I try to update them with npm update, it doesn't work for me. My npm version is 5.3.0.

"private": true,
"dependencies": {
"@angular/animations": "^4.3.4",
"@angular/cdk": "^2.0.0-beta.8",
"@angular/common": "^4.3.4",
"@angular/compiler": "^4.0.0",
"@angular/core": "^4.0.0",
"@angular/forms": "^4.3.4",
"@angular/http": "^4.0.0",
"@angular/material": "^2.0.0-beta.8",
"@angular/platform-browser": "^4.0.0",
"@angular/platform-browser-dynamic": "^4.0.0",
"@angular/router": "^4.0.0",
"@ngui/tab": "^0.5.0",
"angular-route": "^1.6.5",
"angular2-jwt": "^0.2.3",
"angular2-social-login": "^3.1.1",
"bootstrap": "^3.3.7",
"bootstrap-sidebar": "^0.2.2-retry",
"chart.js": "^2.6.0",
"core-js": "^2.4.1",
"ng2-charts": "^1.6.0",
"ng2-toastr": "^4.1.2",
"ng2-validators": "^2.2.0",
"rxjs": "^5.1.0",
"zone.js": "^0.8.4"
},
"devDependencies": {
"@angular/cli": "1.3.1",
"@angular/compiler-cli": "^4.0.0",
"@angular/language-service": "^4.0.0",
"@types/jasmine": "~2.5.53",
"@types/jasminewd2": "~2.0.2",
"@types/node": "~8.0.24",
"codelyzer": "~3.1.2",
"jasmine-core": "~2.7.0",
"jasmine-spec-reporter": "~4.2.1",
"karma": "~1.7.0",
"karma-chrome-launcher": "~2.2.0",
"karma-cli": "~1.0.1",
"karma-coverage-istanbul-reporter": "^1.2.1",
"karma-jasmine": "~1.1.0",
"karma-jasmine-html-reporter": "^0.2.2",
"protractor": "~5.1.2",
"ts-node": "~3.3.0",
"tslint": "~5.6.0",
"typescript": "~2.4.2"
}

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