diff --git a/package.json b/package.json
index 0f84cb8f6fa9..9bee9ef0833a 100644
--- a/package.json
+++ b/package.json
@@ -69,8 +69,7 @@
     "quicktype-core": "^6.0.15",
     "temp": "^0.8.3",
     "tslint": "^5.11.0",
-    "typescript": "~3.2.2",
-    "yarn": "^1.10.1"
+    "typescript": "3.2.4"
   },
   "devDependencies": {
     "@angular/compiler": "^7.2.0-rc.0",
diff --git a/packages/angular_devkit/build_optimizer/package.json b/packages/angular_devkit/build_optimizer/package.json
index ca75522d3741..68289d994417 100644
--- a/packages/angular_devkit/build_optimizer/package.json
+++ b/packages/angular_devkit/build_optimizer/package.json
@@ -10,7 +10,7 @@
   "dependencies": {
     "loader-utils": "1.1.0",
     "source-map": "0.5.6",
-    "typescript": "3.2.2",
+    "typescript": "3.2.4",
     "webpack-sources": "1.2.0"
   }
 }
diff --git a/packages/angular_devkit/build_webpack/package.json b/packages/angular_devkit/build_webpack/package.json
index 0d2788e7924d..f92efc318da7 100644
--- a/packages/angular_devkit/build_webpack/package.json
+++ b/packages/angular_devkit/build_webpack/package.json
@@ -15,7 +15,7 @@
     "webpack-dev-server": "^3.1.4"
   },
   "devDependencies": {
-    "webpack": "^4.6.0",
+    "webpack": "4.28.4",
     "webpack-dev-server": "^3.1.4"
   }
 }
\ No newline at end of file
diff --git a/packages/ngtools/webpack/package.json b/packages/ngtools/webpack/package.json
index 5b01ef4bc0f1..39efe401de7c 100644
--- a/packages/ngtools/webpack/package.json
+++ b/packages/ngtools/webpack/package.json
@@ -35,7 +35,7 @@
   "devDependencies": {
     "@angular/compiler": "^7.2.0-rc.0",
     "@angular/compiler-cli": "^7.2.0-rc.0",
-    "typescript": "~3.2.2",
-    "webpack": "^4.0.0"
+    "typescript": "3.2.4",
+    "webpack": "4.28.4"
   }
 }
diff --git a/yarn.lock b/yarn.lock
index 9c6363c0120d..429cc1455388 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -6122,11 +6122,6 @@ map-visit@^1.0.0:
   dependencies:
     object-visit "^1.0.0"
 
-material-design-icons@^3.0.1:
-  version "3.0.1"
-  resolved "https://registry.yarnpkg.com/material-design-icons/-/material-design-icons-3.0.1.tgz#9a71c48747218ebca51e51a66da682038cdcb7bf"
-  integrity sha1-mnHEh0chjrylHlGmbaaCA4zct78=
-
 math-random@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/math-random/-/math-random-1.0.1.tgz#8b3aac588b8a66e4975e3cdea67f7bb329601fac"
@@ -10006,18 +10001,10 @@ typedarray@^0.0.6:
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
   integrity sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=
 
-typescript@3.2.2, typescript@~3.2.2:
-  version "3.2.2"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.2.2.tgz#fe8101c46aa123f8353523ebdcf5730c2ae493e5"
-  integrity sha512-VCj5UiSyHBjwfYacmDuc/NOk4QQixbE+Wn7MFJuS0nRuPQbof132Pw4u53dm264O8LPc2MVsc7RJNml5szurkg==
-
-uglify-es@^3.3.4:
-  version "3.3.9"
-  resolved "https://registry.yarnpkg.com/uglify-es/-/uglify-es-3.3.9.tgz#0c1c4f0700bed8dbc124cdb304d2592ca203e677"
-  integrity sha512-r+MU0rfv4L/0eeW3xZrd16t4NZfK8Ld4SWVglYBb7ez5uXFWHuVRs6xCTrf1yirs9a4j4Y27nn7SRfO6v67XsQ==
-  dependencies:
-    commander "~2.13.0"
-    source-map "~0.6.1"
+typescript@3.2.4:
+  version "3.2.4"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.2.4.tgz#c585cb952912263d915b462726ce244ba510ef3d"
+  integrity sha512-0RNDbSdEokBeEAkgNbxJ+BLwSManFy9TeXz8uW+48j/xhEXv1ePME60olyzw2XzUqUBNAYFeJadIqAgNqIACwg==
 
 uglify-js@^3.0.7, uglify-js@^3.1.4:
   version "3.4.9"
@@ -10484,7 +10471,37 @@ webpack-subresource-integrity@1.1.0-rc.6:
   dependencies:
     webpack-core "^0.6.8"
 
-webpack@4.28.4, webpack@^4.0.0, webpack@^4.6.0:
+webpack@4.28.4:
+  version "4.28.4"
+  resolved "https://registry.yarnpkg.com/webpack/-/webpack-4.28.4.tgz#1ddae6c89887d7efb752adf0c3cd32b9b07eacd0"
+  integrity sha512-NxjD61WsK/a3JIdwWjtIpimmvE6UrRi3yG54/74Hk9rwNj5FPkA4DJCf1z4ByDWLkvZhTZE+P3C/eh6UD5lDcw==
+  dependencies:
+    "@webassemblyjs/ast" "1.7.11"
+    "@webassemblyjs/helper-module-context" "1.7.11"
+    "@webassemblyjs/wasm-edit" "1.7.11"
+    "@webassemblyjs/wasm-parser" "1.7.11"
+    acorn "^5.6.2"
+    acorn-dynamic-import "^3.0.0"
+    ajv "^6.1.0"
+    ajv-keywords "^3.1.0"
+    chrome-trace-event "^1.0.0"
+    enhanced-resolve "^4.1.0"
+    eslint-scope "^4.0.0"
+    json-parse-better-errors "^1.0.2"
+    loader-runner "^2.3.0"
+    loader-utils "^1.1.0"
+    memory-fs "~0.4.1"
+    micromatch "^3.1.8"
+    mkdirp "~0.5.0"
+    neo-async "^2.5.0"
+    node-libs-browser "^2.0.0"
+    schema-utils "^0.4.4"
+    tapable "^1.1.0"
+    terser-webpack-plugin "^1.1.0"
+    watchpack "^1.5.0"
+    webpack-sources "^1.3.0"
+
+webpack@4.28.4:
   version "4.28.4"
   resolved "https://registry.yarnpkg.com/webpack/-/webpack-4.28.4.tgz#1ddae6c89887d7efb752adf0c3cd32b9b07eacd0"
   integrity sha512-NxjD61WsK/a3JIdwWjtIpimmvE6UrRi3yG54/74Hk9rwNj5FPkA4DJCf1z4ByDWLkvZhTZE+P3C/eh6UD5lDcw==