diff --git a/package.json b/package.json
index f53598e..a37c494 100644
--- a/package.json
+++ b/package.json
@@ -56,7 +56,7 @@
     "mocha-loader": "^1.1.1",
     "rollup": "^0.46.0",
     "rollup-plugin-babel": "^2.7.1",
-    "rollup-plugin-commonjs": "^8.0.2",
+    "rollup-plugin-commonjs": "^9.1.1",
     "rollup-plugin-node-resolve": "^3.0.0",
     "rollup-plugin-uglify": "^2.0.1",
     "sinon": "^3.0.0",