diff --git a/package.json b/package.json
index 894f0adb..0a4d11f8 100644
--- a/package.json
+++ b/package.json
@@ -43,7 +43,7 @@
     "documentation": "^8.1.2",
     "markdown-doctest": "^0.9.1",
     "nyc": "^13.1.0",
-    "rollup": "^0.66.4",
+    "rollup": "^0.66.6",
     "rollup-plugin-babel": "^4.0.3",
     "rollup-plugin-cleanup": "^3.0.0",
     "rollup-plugin-commonjs": "^9.1.8",