diff --git a/packages/angular_devkit/build_angular/package.json b/packages/angular_devkit/build_angular/package.json
index 1def90839ae6..68d76eea9e96 100644
--- a/packages/angular_devkit/build_angular/package.json
+++ b/packages/angular_devkit/build_angular/package.json
@@ -48,7 +48,7 @@
     "terser-webpack-plugin": "1.1.0",
     "webpack": "4.23.1",
     "webpack-dev-middleware": "3.4.0",
-    "webpack-dev-server": "3.1.10",
+    "webpack-dev-server": "3.1.14",
     "webpack-merge": "4.1.5",
     "webpack-sources": "1.3.0",
     "webpack-subresource-integrity": "1.1.0-rc.6"
diff --git a/yarn.lock b/yarn.lock
index c6f815cd2d18..91be224aa1fb 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2781,6 +2781,13 @@ debug@^3.2.5:
   dependencies:
     ms "^2.1.1"
 
+debug@^4.1.0:
+  version "4.1.1"
+  resolved "https://registry.yarnpkg.com/debug/-/debug-4.1.1.tgz#3b72260255109c6b589cee050f1d516139664791"
+  integrity sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==
+  dependencies:
+    ms "^2.1.1"
+
 debuglog@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/debuglog/-/debuglog-1.0.1.tgz#aa24ffb9ac3df9a2351837cfb2d279360cd78492"
@@ -2954,7 +2961,7 @@ detect-libc@^1.0.2:
   resolved "https://registry.yarnpkg.com/detect-libc/-/detect-libc-1.0.3.tgz#fa137c4bd698edf55cd5cd02ac559f91a4c4ba9b"
   integrity sha1-+hN8S9aY7fVc1c0CrFWfkaTEups=
 
-detect-node@^2.0.3:
+detect-node@^2.0.3, detect-node@^2.0.4:
   version "2.0.4"
   resolved "https://registry.yarnpkg.com/detect-node/-/detect-node-2.0.4.tgz#014ee8f8f669c5c58023da64b8179c083a28c46c"
   integrity sha512-ZIzRpLJrOj7jjP2miAtgqIfmzbxa4ZOr5jJc601zklsfEx9oTzmmj2nVpIPRpNlRTIh8lc1kyViIY7BWSGNmKw==
@@ -4262,6 +4269,11 @@ handle-thing@^1.2.5:
   resolved "https://registry.yarnpkg.com/handle-thing/-/handle-thing-1.2.5.tgz#fd7aad726bf1a5fd16dfc29b2f7a6601d27139c4"
   integrity sha1-/Xqtcmvxpf0W38KbL3pmAdJxOcQ=
 
+handle-thing@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/handle-thing/-/handle-thing-2.0.0.tgz#0e039695ff50c93fc288557d696f3c1dc6776754"
+  integrity sha512-d4sze1JNC454Wdo2fkuyzCr6aHcbL6PGGuFAz0Li/NcOm1tCHGnWDRmJP85dh9IhQErTc2svWFEX5xHIOo//kQ==
+
 handlebars@^4.0.1, handlebars@^4.0.11, handlebars@^4.0.2:
   version "4.0.12"
   resolved "https://registry.yarnpkg.com/handlebars/-/handlebars-4.0.12.tgz#2c15c8a96d46da5e266700518ba8cb8d919d5bc5"
@@ -6950,7 +6962,7 @@ object.pick@^1.3.0:
   dependencies:
     isobject "^3.0.1"
 
-obuf@^1.0.0, obuf@^1.1.1:
+obuf@^1.0.0, obuf@^1.1.1, obuf@^1.1.2:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/obuf/-/obuf-1.1.2.tgz#09bea3343d41859ebd446292d11c9d4db619084e"
   integrity sha512-PX1wu0AmAdPqOL1mWhqmlOd8kOIZQwGZw6rh7uby9fTc5lhaOWFLX3I6R1hrF9k3zUY40e6igsLGkDXK92LJNg==
@@ -7991,6 +8003,15 @@ readable-stream@1.1.x, "readable-stream@1.x >=1.1.9":
     isarray "0.0.1"
     string_decoder "~0.10.x"
 
+readable-stream@^3.0.6:
+  version "3.1.1"
+  resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-3.1.1.tgz#ed6bbc6c5ba58b090039ff18ce670515795aeb06"
+  integrity sha512-DkN66hPyqDhnIQ6Jcsvx9bFjhw214O4poMBcIMgPVpQvNy9a0e0Uhg5SqySyDKAmUlwt8LonTBz1ezOnM8pUdA==
+  dependencies:
+    inherits "^2.0.3"
+    string_decoder "^1.1.1"
+    util-deprecate "^1.0.1"
+
 readable-stream@~2.0.5, readable-stream@~2.0.6:
   version "2.0.6"
   resolved "http://registry.npmjs.org/readable-stream/-/readable-stream-2.0.6.tgz#8f90341e68a53ccc928788dacfcd11b36eb9b78e"
@@ -9107,6 +9128,18 @@ spdy-transport@^2.0.18:
     safe-buffer "^5.0.1"
     wbuf "^1.7.2"
 
+spdy-transport@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/spdy-transport/-/spdy-transport-3.0.0.tgz#00d4863a6400ad75df93361a1608605e5dcdcf31"
+  integrity sha512-hsLVFE5SjA6TCisWeJXFKniGGOpBgMLmerfO2aCyCU5s7nJ/rpAepqmFifv/GCbSbueEeAJJnmSQ2rKC/g8Fcw==
+  dependencies:
+    debug "^4.1.0"
+    detect-node "^2.0.4"
+    hpack.js "^2.1.6"
+    obuf "^1.1.2"
+    readable-stream "^3.0.6"
+    wbuf "^1.7.3"
+
 spdy@^3.4.1:
   version "3.4.7"
   resolved "https://registry.yarnpkg.com/spdy/-/spdy-3.4.7.tgz#42ff41ece5cc0f99a3a6c28aabb73f5c3b03acbc"
@@ -9119,6 +9152,17 @@ spdy@^3.4.1:
     select-hose "^2.0.0"
     spdy-transport "^2.0.18"
 
+spdy@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/spdy/-/spdy-4.0.0.tgz#81f222b5a743a329aa12cea6a390e60e9b613c52"
+  integrity sha512-ot0oEGT/PGUpzf/6uk4AWLqkq+irlqHXkrdbk51oWONh3bxQmBuljxPNl66zlRRcIJStWq0QkLUCPOPjgjvU0Q==
+  dependencies:
+    debug "^4.1.0"
+    handle-thing "^2.0.0"
+    http-deceiver "^1.2.7"
+    select-hose "^2.0.0"
+    spdy-transport "^3.0.0"
+
 speed-measure-webpack-plugin@1.2.3:
   version "1.2.3"
   resolved "https://registry.yarnpkg.com/speed-measure-webpack-plugin/-/speed-measure-webpack-plugin-1.2.3.tgz#de170b5cefbfa1c039d95e639edd3ad50cfc7c48"
@@ -9322,6 +9366,13 @@ string_decoder@^1.0.0, string_decoder@~1.1.1:
   dependencies:
     safe-buffer "~5.1.0"
 
+string_decoder@^1.1.1:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/string_decoder/-/string_decoder-1.2.0.tgz#fe86e738b19544afe70469243b2a1ee9240eae8d"
+  integrity sha512-6YqyX6ZWEYguAxgZzHGL7SsCeGx3V2TtOTqZz1xSTSWnqsbWwbptafNyvf/ACquZUXV3DANr5BDIwNYe1mN42w==
+  dependencies:
+    safe-buffer "~5.1.0"
+
 string_decoder@~0.10.x:
   version "0.10.31"
   resolved "https://registry.yarnpkg.com/string_decoder/-/string_decoder-0.10.31.tgz#62e203bc41766c6c28c9fc84301dab1c5310fa94"
@@ -10035,7 +10086,7 @@ useragent@^2.1.12:
     lru-cache "4.1.x"
     tmp "0.0.x"
 
-util-deprecate@~1.0.1:
+util-deprecate@^1.0.1, util-deprecate@~1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/util-deprecate/-/util-deprecate-1.0.2.tgz#450d4dc9fa70de732762fbd2d4a28981419a0ccf"
   integrity sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8=
@@ -10134,7 +10185,7 @@ watchpack@^1.5.0:
     graceful-fs "^4.1.2"
     neo-async "^2.5.0"
 
-wbuf@^1.1.0, wbuf@^1.7.2:
+wbuf@^1.1.0, wbuf@^1.7.2, wbuf@^1.7.3:
   version "1.7.3"
   resolved "https://registry.yarnpkg.com/wbuf/-/wbuf-1.7.3.tgz#c1d8d149316d3ea852848895cb6a0bfe887b87df"
   integrity sha512-O84QOnr0icsbFGLS0O3bI5FswxzRr8/gHwWkDlQFskhSPryQXvrTMxjxGP4+iWYoauLoBvfDpkrOauZ+0iZpDA==
@@ -10197,7 +10248,43 @@ webpack-dev-middleware@3.4.0:
     range-parser "^1.0.3"
     webpack-log "^2.0.0"
 
-webpack-dev-server@3.1.10, webpack-dev-server@^3.1.4:
+webpack-dev-server@3.1.14:
+  version "3.1.14"
+  resolved "https://registry.yarnpkg.com/webpack-dev-server/-/webpack-dev-server-3.1.14.tgz#60fb229b997fc5a0a1fc6237421030180959d469"
+  integrity sha512-mGXDgz5SlTxcF3hUpfC8hrQ11yhAttuUQWf1Wmb+6zo3x6rb7b9mIfuQvAPLdfDRCGRGvakBWHdHOa0I9p/EVQ==
+  dependencies:
+    ansi-html "0.0.7"
+    bonjour "^3.5.0"
+    chokidar "^2.0.0"
+    compression "^1.5.2"
+    connect-history-api-fallback "^1.3.0"
+    debug "^3.1.0"
+    del "^3.0.0"
+    express "^4.16.2"
+    html-entities "^1.2.0"
+    http-proxy-middleware "~0.18.0"
+    import-local "^2.0.0"
+    internal-ip "^3.0.1"
+    ip "^1.1.5"
+    killable "^1.0.0"
+    loglevel "^1.4.1"
+    opn "^5.1.0"
+    portfinder "^1.0.9"
+    schema-utils "^1.0.0"
+    selfsigned "^1.9.1"
+    semver "^5.6.0"
+    serve-index "^1.7.2"
+    sockjs "0.3.19"
+    sockjs-client "1.3.0"
+    spdy "^4.0.0"
+    strip-ansi "^3.0.0"
+    supports-color "^5.1.0"
+    url "^0.11.0"
+    webpack-dev-middleware "3.4.0"
+    webpack-log "^2.0.0"
+    yargs "12.0.2"
+
+webpack-dev-server@^3.1.4:
   version "3.1.10"
   resolved "https://registry.yarnpkg.com/webpack-dev-server/-/webpack-dev-server-3.1.10.tgz#507411bee727ee8d2fdffdc621b66a64ab3dea2b"
   integrity sha512-RqOAVjfqZJtQcB0LmrzJ5y4Jp78lv9CK0MZ1YJDTaTmedMZ9PU9FLMQNrMCfVu8hHzaVLVOJKBlGEHMN10z+ww==