diff --git a/aio/package.json b/aio/package.json
index a4a34973a3..ecb2c02739 100644
--- a/aio/package.json
+++ b/aio/package.json
@@ -35,7 +35,7 @@
     "sw-manifest": "ngu-sw-manifest --dist dist --in ngsw-manifest.json --out dist/ngsw-manifest.json",
     "sw-copy": "cp node_modules/@angular/service-worker/bundles/worker-basic.min.js dist/",
     "postinstall": "node tools/cli-patches/patch.js",
-    "build-ie-polyfills": "webpack -p src/ie-polyfills.js src/generated/ie-polyfills.min.js"
+    "build-ie-polyfills": "node node_modules/webpack/bin/webpack.js -p src/ie-polyfills.js src/generated/ie-polyfills.min.js"
   },
   "private": true,
   "dependencies": {
@@ -113,7 +113,6 @@
     "unist-util-visit": "^1.1.1",
     "vrsource-tslint-rules": "^4.0.1",
     "watchr": "^3.0.1",
-    "webpack": "^2.5.1",
     "yargs": "^7.0.2"
   }
 }
diff --git a/aio/yarn.lock b/aio/yarn.lock
index 093e76a161..00685fdc91 100644
--- a/aio/yarn.lock
+++ b/aio/yarn.lock
@@ -260,7 +260,7 @@ agent-base@2:
     extend "~3.0.0"
     semver "~5.0.1"
 
-ajv-keywords@^1.0.0, ajv-keywords@^1.1.1:
+ajv-keywords@^1.0.0:
   version "1.5.1"
   resolved "https://registry.yarnpkg.com/ajv-keywords/-/ajv-keywords-1.5.1.tgz#314dd0a4b3368fad3dfcdc54ede6171b886daf3c"
 
@@ -6499,10 +6499,6 @@ source-list-map@^0.1.7, source-list-map@~0.1.7:
   version "0.1.8"
   resolved "https://registry.yarnpkg.com/source-list-map/-/source-list-map-0.1.8.tgz#c550b2ab5427f6b3f21f5afead88c4f5587b2106"
 
-source-list-map@^1.1.1:
-  version "1.1.2"
-  resolved "https://registry.yarnpkg.com/source-list-map/-/source-list-map-1.1.2.tgz#9889019d1024cce55cdc069498337ef6186a11a1"
-
 source-list-map@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/source-list-map/-/source-list-map-2.0.0.tgz#aaa47403f7b245a92fbc97ea08f250d6087ed085"
@@ -7205,15 +7201,6 @@ uglify-js@^2.6, uglify-js@^2.8.27, uglify-js@~2.8.22:
   optionalDependencies:
     uglify-to-browserify "~1.0.0"
 
-uglify-js@^2.8.5:
-  version "2.8.23"
-  resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-2.8.23.tgz#8230dd9783371232d62a7821e2cf9a817270a8a0"
-  dependencies:
-    source-map "~0.5.1"
-    yargs "~3.10.0"
-  optionalDependencies:
-    uglify-to-browserify "~1.0.0"
-
 uglify-js@~2.3:
   version "2.3.6"
   resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-2.3.6.tgz#fa0984770b428b7a9b2a8058f46355d14fef211a"
@@ -7694,13 +7681,6 @@ webpack-sources@^0.1.0:
     source-list-map "~0.1.7"
     source-map "~0.5.3"
 
-webpack-sources@^0.2.3:
-  version "0.2.3"
-  resolved "https://registry.yarnpkg.com/webpack-sources/-/webpack-sources-0.2.3.tgz#17c62bfaf13c707f9d02c479e0dcdde8380697fb"
-  dependencies:
-    source-list-map "^1.1.1"
-    source-map "~0.5.3"
-
 webpack-sources@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/webpack-sources/-/webpack-sources-1.0.1.tgz#c7356436a4d13123be2e2426a05d1dad9cbe65cf"
@@ -7735,32 +7715,6 @@ webpack@3.0.0-rc.1:
     webpack-sources "^1.0.1"
     yargs "^6.0.0"
 
-webpack@^2.5.1:
-  version "2.5.1"
-  resolved "https://registry.yarnpkg.com/webpack/-/webpack-2.5.1.tgz#61742f0cf8af555b87460a9cd8bba2f1e3ee2fce"
-  dependencies:
-    acorn "^5.0.0"
-    acorn-dynamic-import "^2.0.0"
-    ajv "^4.7.0"
-    ajv-keywords "^1.1.1"
-    async "^2.1.2"
-    enhanced-resolve "^3.0.0"
-    interpret "^1.0.0"
-    json-loader "^0.5.4"
-    json5 "^0.5.1"
-    loader-runner "^2.3.0"
-    loader-utils "^0.2.16"
-    memory-fs "~0.4.1"
-    mkdirp "~0.5.0"
-    node-libs-browser "^2.0.0"
-    source-map "^0.5.3"
-    supports-color "^3.1.0"
-    tapable "~0.2.5"
-    uglify-js "^2.8.5"
-    watchpack "^1.3.1"
-    webpack-sources "^0.2.3"
-    yargs "^6.0.0"
-
 websocket-driver@>=0.5.1:
   version "0.6.5"
   resolved "https://registry.yarnpkg.com/websocket-driver/-/websocket-driver-0.6.5.tgz#5cb2556ceb85f4373c6d8238aa691c8454e13a36"