diff --git a/package.json b/package.json
index 40135678b8..d7a81faab8 100644
--- a/package.json
+++ b/package.json
@@ -103,7 +103,7 @@
     "zone.js": "^0.8.26"
   },
   "devDependencies": {
-    "@angular-devkit/build-optimizer": "^0.6.8",
+    "@angular-devkit/build-optimizer": "^0.901.0",
     "@angular/cli": "^6.0.8",
     "@angular/compiler-cli": "^6.0.6",
     "@angular/language-service": "^6.0.6",
@@ -119,16 +119,16 @@
     "assets-webpack-plugin": "^3.8.4",
     "awesome-typescript-loader": "^5.2.0",
     "codelyzer": "^4.3.0",
-    "copy-webpack-plugin": "^4.5.1",
+    "copy-webpack-plugin": "^6.0.0",
     "cross-env": "^5.2.0",
-    "css-loader": "^0.28.11",
-    "exports-loader": "^0.7.0",
+    "css-loader": "^4.0.0",
+    "exports-loader": "^1.0.0",
     "expose-loader": "^0.7.5",
-    "file-loader": "^1.1.11",
+    "file-loader": "^6.0.0",
     "find-root": "^1.1.0",
     "gh-pages": "^1.2.0",
-    "html-webpack-plugin": "^3.2.0",
-    "imports-loader": "^0.8.0",
+    "html-webpack-plugin": "^5.0.0",
+    "imports-loader": "^1.0.0",
     "istanbul-instrumenter-loader": "^3.0.1",
     "jasmine-core": "^3.1.0",
     "karma": "^2.0.4",
@@ -138,8 +138,8 @@
     "karma-mocha-reporter": "^2.2.5",
     "karma-remap-coverage": "^0.1.5",
     "karma-sourcemap-loader": "^0.3.7",
-    "karma-webpack": "^3.0.0",
-    "mini-css-extract-plugin": "^0.4.0",
+    "karma-webpack": "^5.0.0",
+    "mini-css-extract-plugin": "^1.0.0",
     "node-sass": "^4.9.0",
     "npm-run-all": "^4.1.3",
     "optimize-js-plugin": "^0.0.4",
@@ -148,11 +148,11 @@
     "raw-loader": "^0.5.1",
     "rimraf": "^2.6.2",
     "rxjs-tslint": "^0.1.5",
-    "sass-loader": "^7.0.3",
+    "sass-loader": "^9.0.0",
     "script-ext-html-webpack-plugin": "^2.0.1",
-    "source-map-loader": "^0.2.3",
-    "string-replace-loader": "^2.1.1",
-    "style-loader": "^0.21.0",
+    "source-map-loader": "^1.0.0",
+    "string-replace-loader": "^3.0.0",
+    "style-loader": "^1.1.4",
     "to-string-loader": "^1.1.5",
     "ts-node": "^7.0.0",
     "tslib": "^1.9.3",
@@ -161,9 +161,9 @@
     "typedoc": "^0.11.1",
     "typescript": "~2.7.2",
     "uglifyjs-webpack-plugin": "^1.2.6",
-    "url-loader": "^1.0.1",
-    "webpack": "^4.12.0",
-    "webpack-cli": "^3.0.8",
+    "url-loader": "^4.0.0",
+    "webpack": "^5.0.0",
+    "webpack-cli": "^4.0.0",
     "webpack-dev-middleware": "^3.1.3",
     "webpack-dev-server": "^3.1.4",
     "webpack-inline-manifest-plugin": "^4.0.1",