diff --git a/examples/polymer-cli/package.json b/examples/polymer-cli/package.json
index c093cb2fdbeb..21512dddfaba 100644
--- a/examples/polymer-cli/package.json
+++ b/examples/polymer-cli/package.json
@@ -16,15 +16,15 @@
     "@storybook/addon-links": "5.3.0-alpha.22",
     "@storybook/addon-notes": "5.3.0-alpha.22",
     "@storybook/addon-options": "5.3.0-alpha.22",
-    "@storybook/addon-storysource": "5.3.0-alpha.22",
-    "@storybook/addon-viewport": "5.3.0-alpha.22",
+    "@storybook/addon-storysource": "6.1.0",
+    "@storybook/addon-viewport": "6.2.0",
     "@storybook/polymer": "5.3.0-alpha.22",
     "@storybook/source-loader": "5.3.0-alpha.22",
     "@webcomponents/webcomponentsjs": "^1.2.0",
     "global": "^4.3.2",
     "lit-html": "^1.0.0",
     "polymer-webpack-loader": "^2.0.3",
-    "webpack": "^4.33.0"
+    "webpack": "^5.0.0"
   },
   "devDependencies": {
     "copy-webpack-plugin": "^5.0.0",