diff --git a/packages/storybook/package.json b/packages/storybook/package.json
index 470f4c96d2..d75b5e3535 100644
--- a/packages/storybook/package.json
+++ b/packages/storybook/package.json
@@ -27,7 +27,7 @@
     "cookie-universal": "2.1.4",
     "npm-run-all": "4.1.5",
     "path": "0.12.7",
-    "postcss-assets": "5.0.0",
+    "postcss-assets": "6.0.0",
     "storybook-vue-router": "1.0.7",
     "vue-cli-plugin-storybook": "2.0.0"
   },