diff --git a/package.json b/package.json
index 4f643992..a3a171bb 100644
--- a/package.json
+++ b/package.json
@@ -45,7 +45,7 @@
     "babel-plugin-transform-mangle-names": "~2.1.2",
     "babel-plugin-transform-merge-sibling-variables": "6.9.0",
     "babel-plugin-transform-minify-booleans": "6.9.0",
-    "babel-plugin-transform-undefined-to-void": "6.9.0",
+    "babel-plugin-transform-undefined-to-void": "6.9.1",
     "browserify": "~16.1.1",
     "eslint": "~4.19.1",
     "eslint-config-semistandard": "~12.0.0",