diff --git a/examples/polymer-cli/package.json b/examples/polymer-cli/package.json
index c093cb2fdbeb..a6174e69192e 100644
--- a/examples/polymer-cli/package.json
+++ b/examples/polymer-cli/package.json
@@ -16,8 +16,8 @@
     "@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",