diff --git a/packages/angular_devkit/build_angular/package.json b/packages/angular_devkit/build_angular/package.json
index 1a584426d0..4dac2ae82b 100644
--- a/packages/angular_devkit/build_angular/package.json
+++ b/packages/angular_devkit/build_angular/package.json
@@ -67,7 +67,7 @@
     "tree-kill": "1.2.2",
     "webpack": "4.43.0",
     "webpack-dev-middleware": "3.7.2",
-    "webpack-dev-server": "3.10.3",
+    "webpack-dev-server": "3.11.0",
     "webpack-merge": "4.2.2",
     "webpack-sources": "1.4.3",
     "webpack-subresource-integrity": "1.4.1",
diff --git a/yarn.lock b/yarn.lock
index fee7590330..a6ee680592 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5850,7 +5850,7 @@ html-encoding-sniffer@^2.0.1:
   dependencies:
     whatwg-encoding "^1.0.5"
 
-html-entities@^1.2.1:
+html-entities@^1.2.1, html-entities@^1.3.1:
   version "1.3.1"
   resolved "https://registry.yarnpkg.com/html-entities/-/html-entities-1.3.1.tgz#fb9a1a4b5b14c5daba82d3e34c6ae4fe701a0e44"
   integrity sha512-rhE/4Z3hIhzHAUKbW8jVcCyuT5oJCXXqhN/6mXXVCpzTmvJnoH2HL/bt3EZ6p55jbFJBeAe1ZNpL5BugLujxNA==
@@ -7509,7 +7509,7 @@ log4js@^4.0.0:
     rfdc "^1.1.4"
     streamroller "^1.0.6"
 
-loglevel@^1.6.6:
+loglevel@^1.6.6, loglevel@^1.6.8:
   version "1.6.8"
   resolved "https://registry.yarnpkg.com/loglevel/-/loglevel-1.6.8.tgz#8a25fb75d092230ecd4457270d80b54e28011171"
   integrity sha512-bsU7+gc9AJ2SqpzxwU3+1fedl8zAntbtC5XYlt3s2j1hJcn2PsXSmgN8TaLG/J1/2mod4+cE/3vNL70/c1RNCA==
@@ -9237,6 +9237,15 @@ portfinder@^1.0.25:
     debug "^3.1.1"
     mkdirp "^0.5.1"
 
+portfinder@^1.0.26:
+  version "1.0.26"
+  resolved "https://registry.yarnpkg.com/portfinder/-/portfinder-1.0.26.tgz#475658d56ca30bed72ac7f1378ed350bd1b64e70"
+  integrity sha512-Xi7mKxJHHMI3rIUrnm/jjUgwhbYMkp/XKEcZX3aG4BrumLpq3nmoQMX+ClYnDZnZ/New7IatC1no5RX0zo1vXQ==
+  dependencies:
+    async "^2.6.2"
+    debug "^3.1.1"
+    mkdirp "^0.5.1"
+
 posix-character-classes@^0.1.0:
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/posix-character-classes/-/posix-character-classes-0.1.1.tgz#01eac0fe3b5af71a2a6c02feabb8c1fef7e00eab"
@@ -11025,6 +11034,15 @@ sockjs@0.3.19:
     faye-websocket "^0.10.0"
     uuid "^3.0.1"
 
+sockjs@0.3.20:
+  version "0.3.20"
+  resolved "https://registry.yarnpkg.com/sockjs/-/sockjs-0.3.20.tgz#b26a283ec562ef8b2687b44033a4eeceac75d855"
+  integrity sha512-SpmVOVpdq0DJc0qArhF3E5xsxvaiqGNb73XfgBpK1y3UD5gs8DSo8aCTsuT5pX8rssdc2NDIzANwP9eCAiSdTA==
+  dependencies:
+    faye-websocket "^0.10.0"
+    uuid "^3.4.0"
+    websocket-driver "0.6.5"
+
 socks-proxy-agent@^4.0.0:
   version "4.0.2"
   resolved "https://registry.yarnpkg.com/socks-proxy-agent/-/socks-proxy-agent-4.0.2.tgz#3c8991f3145b2799e70e11bd5fbc8b1963116386"
@@ -11234,7 +11252,7 @@ spdy-transport@^3.0.0:
     readable-stream "^3.0.6"
     wbuf "^1.7.3"
 
-spdy@^4.0.1:
+spdy@^4.0.1, spdy@^4.0.2:
   version "4.0.2"
   resolved "https://registry.yarnpkg.com/spdy/-/spdy-4.0.2.tgz#b74f466203a3eda452c02492b91fb9e84a27677b"
   integrity sha512-r46gZQZQV+Kl9oItvl1JZZqJKGr+oEkB08A6BzkiR7593/7IbtuncXHd2YoYeTsG4157ZssMu9KYvUHLcjcDoA==
@@ -12440,7 +12458,7 @@ uuid@8.0.0:
   resolved "https://registry.yarnpkg.com/uuid/-/uuid-8.0.0.tgz#bc6ccf91b5ff0ac07bbcdbf1c7c4e150db4dbb6c"
   integrity sha512-jOXGuXZAWdsTH7eZLtyXMqUb9EcWMGZNbL9YcGBJl4MH4nrxHmZJhEHvyLFrkxo+28uLb/NYRcStH48fnD0Vzw==
 
-uuid@^3.0.0, uuid@^3.0.1, uuid@^3.1.0, uuid@^3.3.2:
+uuid@^3.0.0, uuid@^3.0.1, uuid@^3.1.0, uuid@^3.3.2, uuid@^3.4.0:
   version "3.4.0"
   resolved "https://registry.yarnpkg.com/uuid/-/uuid-3.4.0.tgz#b23e4358afa8a202fe7a100af1f5f883f02007ee"
   integrity sha512-HjSDRw6gZE5JMggctHBcjVak08+KEVhSIiDzFnT9S9aegmp85S/bReBVTb4QTFaRNptJ9kuYaNhnbNEOkbKb/A==
@@ -12694,6 +12712,45 @@ webpack-dev-server@3.10.3:
     ws "^6.2.1"
     yargs "12.0.5"
 
+webpack-dev-server@3.11.0:
+  version "3.11.0"
+  resolved "https://registry.yarnpkg.com/webpack-dev-server/-/webpack-dev-server-3.11.0.tgz#8f154a3bce1bcfd1cc618ef4e703278855e7ff8c"
+  integrity sha512-PUxZ+oSTxogFQgkTtFndEtJIPNmml7ExwufBZ9L2/Xyyd5PnOL5UreWe5ZT7IU25DSdykL9p1MLQzmLh2ljSeg==
+  dependencies:
+    ansi-html "0.0.7"
+    bonjour "^3.5.0"
+    chokidar "^2.1.8"
+    compression "^1.7.4"
+    connect-history-api-fallback "^1.6.0"
+    debug "^4.1.1"
+    del "^4.1.1"
+    express "^4.17.1"
+    html-entities "^1.3.1"
+    http-proxy-middleware "0.19.1"
+    import-local "^2.0.0"
+    internal-ip "^4.3.0"
+    ip "^1.1.5"
+    is-absolute-url "^3.0.3"
+    killable "^1.0.1"
+    loglevel "^1.6.8"
+    opn "^5.5.0"
+    p-retry "^3.0.1"
+    portfinder "^1.0.26"
+    schema-utils "^1.0.0"
+    selfsigned "^1.10.7"
+    semver "^6.3.0"
+    serve-index "^1.9.1"
+    sockjs "0.3.20"
+    sockjs-client "1.4.0"
+    spdy "^4.0.2"
+    strip-ansi "^3.0.1"
+    supports-color "^6.1.0"
+    url "^0.11.0"
+    webpack-dev-middleware "^3.7.2"
+    webpack-log "^2.0.0"
+    ws "^6.2.1"
+    yargs "^13.3.2"
+
 webpack-log@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/webpack-log/-/webpack-log-2.0.0.tgz#5b7928e0637593f119d32f6227c1e0ac31e1b47f"
@@ -12789,6 +12846,13 @@ webpack@4.43.0:
     watchpack "^1.6.1"
     webpack-sources "^1.4.1"
 
+websocket-driver@0.6.5:
+  version "0.6.5"
+  resolved "https://registry.yarnpkg.com/websocket-driver/-/websocket-driver-0.6.5.tgz#5cb2556ceb85f4373c6d8238aa691c8454e13a36"
+  integrity sha1-XLJVbOuF9Dc8bYI4qmkchFThOjY=
+  dependencies:
+    websocket-extensions ">=0.1.1"
+
 websocket-driver@>=0.5.1:
   version "0.7.3"
   resolved "https://registry.yarnpkg.com/websocket-driver/-/websocket-driver-0.7.3.tgz#a2d4e0d4f4f116f1e6297eba58b05d430100e9f9"
@@ -13136,7 +13200,7 @@ yargs@^11.0.0:
     y18n "^3.2.1"
     yargs-parser "^9.0.2"
 
-yargs@^13.2.4:
+yargs@^13.2.4, yargs@^13.3.2:
   version "13.3.2"
   resolved "https://registry.yarnpkg.com/yargs/-/yargs-13.3.2.tgz#ad7ffefec1aa59565ac915f82dccb38a9c31a2dd"
   integrity sha512-AX3Zw5iPruN5ie6xGRIDgqkT+ZhnRlZMLMHAs8tg7nRruy2Nb+i5o9bwghAogtM08q1dpr2LVoS8KSTMYpWXUw==