diff --git a/package.json b/package.json
index 08525ef..6261d88 100644
--- a/package.json
+++ b/package.json
@@ -69,7 +69,7 @@
     "text-loader": "0.0.1",
     "wct-browser-legacy": "1.0.2",
     "web-component-tester": "6.9.1",
-    "webpack": "4.28.3",
+    "webpack": "4.28.4",
     "webpack-cli": "3.2.0",
     "webpack-dev-server": "3.1.13",
     "workbox-webpack-plugin": "3.6.3",
diff --git a/yarn.lock b/yarn.lock
index 7d88844..1181466 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -11704,10 +11704,10 @@ webpack-sources@^1.3.0:
     source-list-map "^2.0.0"
     source-map "~0.6.1"
 
-webpack@4.28.3:
-  version "4.28.3"
-  resolved "https://registry.yarnpkg.com/webpack/-/webpack-4.28.3.tgz#8acef6e77fad8a01bfd0c2b25aa3636d46511874"
-  integrity sha512-vLZN9k5I7Nr/XB1IDG9GbZB4yQd1sPuvufMFgJkx0b31fi2LD97KQIjwjxE7xytdruAYfu5S0FLBLjdxmwGJCg==
+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"