diff --git a/package.json b/package.json
index 4c62f46..86775f5 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,7 @@
     "nyc": "^13.1.0",
     "rollup": "^1.0.0",
     "rollup-plugin-babel": "^4.2.0",
-    "rollup-plugin-filesize": "^6.0.0",
+    "rollup-plugin-filesize": "^9.0.0",
     "rollup-plugin-node-resolve": "^4.0.0",
     "@babel/plugin-proposal-class-properties": "^7.2.1"
   },