diff --git a/package.json b/package.json
index 4a500e9..a6a58b1 100644
--- a/package.json
+++ b/package.json
@@ -70,7 +70,7 @@
     "wct-browser-legacy": "1.0.2",
     "web-component-tester": "6.9.2",
     "webpack": "4.29.5",
-    "webpack-cli": "3.2.3",
+    "webpack-cli": "3.3.0",
     "webpack-dev-server": "3.1.14",
     "workbox-webpack-plugin": "3.6.3",
     "xo": "0.24.0"
diff --git a/yarn.lock b/yarn.lock
index 341ef18..557ddea 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -11724,10 +11724,10 @@ webidl-conversions@^4.0.2:
   version "4.0.2"
   resolved "https://registry.yarnpkg.com/webidl-conversions/-/webidl-conversions-4.0.2.tgz#a855980b1f0b6b359ba1d5d9fb39ae941faa63ad"
 
-webpack-cli@3.2.3:
-  version "3.2.3"
-  resolved "https://registry.yarnpkg.com/webpack-cli/-/webpack-cli-3.2.3.tgz#13653549adfd8ccd920ad7be1ef868bacc22e346"
-  integrity sha512-Ik3SjV6uJtWIAN5jp5ZuBMWEAaP5E4V78XJ2nI+paFPh8v4HPSwo/myN0r29Xc/6ZKnd2IdrAlpSgNOu2CDQ6Q==
+webpack-cli@3.3.0:
+  version "3.3.0"
+  resolved "https://registry.yarnpkg.com/webpack-cli/-/webpack-cli-3.3.0.tgz#55c8a74cae1e88117f9dda3a801c7272e93ca318"
+  integrity sha512-t1M7G4z5FhHKJ92WRKwZ1rtvi7rHc0NZoZRbSkol0YKl4HvcC8+DsmGDmK7MmZxHSAetHagiOsjOB6MmzC2TUw==
   dependencies:
     chalk "^2.4.1"
     cross-spawn "^6.0.5"
@@ -11739,7 +11739,7 @@ webpack-cli@3.2.3:
     loader-utils "^1.1.0"
     supports-color "^5.5.0"
     v8-compile-cache "^2.0.2"
-    yargs "^12.0.4"
+    yargs "^12.0.5"
 
 webpack-dev-middleware@3.4.0:
   version "3.4.0"
@@ -12299,7 +12299,7 @@ yargs@^12.0.1:
     y18n "^3.2.1 || ^4.0.0"
     yargs-parser "^10.1.0"
 
-yargs@^12.0.2, yargs@^12.0.4, yargs@^12.0.5:
+yargs@^12.0.2, yargs@^12.0.5:
   version "12.0.5"
   resolved "https://registry.yarnpkg.com/yargs/-/yargs-12.0.5.tgz#05f5997b609647b64f66b81e3b4b10a368e7ad13"
   integrity sha512-Lhz8TLaYnxq/2ObqHDql8dX8CJi97oHxrjUcYtzKbbykPtVW9WB+poxI+NM2UIzsMgNCZTIf0AQwsjK5yMAqZw==