diff --git a/app/polymer/package.json b/app/polymer/package.json
index ba5a756e04e3..bc8ea7f37a60 100644
--- a/app/polymer/package.json
+++ b/app/polymer/package.json
@@ -25,12 +25,12 @@
     "@storybook/addons": "^3.4.0-alpha.4",
     "@storybook/channel-postmessage": "^3.4.0-alpha.4",
     "@storybook/client-logger": "^3.4.0-alpha.4",
-    "@storybook/core": "^3.4.0-alpha.4",
+    "@storybook/core": "^6.2.0",
     "@storybook/node-logger": "^3.4.0-alpha.4",
     "@storybook/ui": "^3.4.0-alpha.4",
     "@webcomponents/webcomponentsjs": "^1.0.17",
     "airbnb-js-shims": "^1.3.0",
-    "autoprefixer": "^7.1.6",
+    "autoprefixer": "^10.0.0",
     "babel-core": "^6.26.0",
     "babel-loader": "^7.1.2",
     "babel-plugin-react-docgen": "^1.8.2",
@@ -50,7 +50,7 @@
     "configstore": "^3.1.1",
     "copy-webpack-plugin": "^4.2.0",
     "core-js": "^2.5.1",
-    "css-loader": "^0.28.7",
+    "css-loader": "^5.0.0",
     "express": "^4.16.2",
     "file-loader": "^0.11.2",
     "find-cache-dir": "^1.0.0",
@@ -61,8 +61,8 @@
     "json5": "^0.5.1",
     "lodash.pick": "^4.4.0",
     "polymer-webpack-loader": "2.0.1",
-    "postcss-flexbugs-fixes": "^3.2.0",
-    "postcss-loader": "^2.0.8",
+    "postcss-flexbugs-fixes": "^5.0.0",
+    "postcss-loader": "^4.0.0",
     "prop-types": "^15.6.0",
     "qs": "^6.5.1",
     "react": "^16.0.0",