diff --git a/package.json b/package.json
index 7709d41..9934a9b 100644
--- a/package.json
+++ b/package.json
@@ -57,7 +57,7 @@
     "mocha": "^5.0.0",
     "phantomjs-prebuilt": "^2.1.15",
     "rimraf": "^2.6.1",
-    "rollup": "^0.63.0",
+    "rollup": "^0.64.1",
     "rollup-plugin-buble": "^0.18.0",
     "rollup-plugin-commonjs": "^8.1.0",
     "rollup-plugin-json": "^2.3.0",