diff --git a/node-support/package.json b/node-support/package.json
index 80eb23a2..1d9a91b3 100644
--- a/node-support/package.json
+++ b/node-support/package.json
@@ -77,6 +77,6 @@
     "jsdoc": "jsdoc -c jsdoc.json",
     "test": "mocha --recursive",
     "prepare": "bin/prepare.sh",
-    "postinstall": "bin/download-protoc.js"
+    "postinstall": "node bin/download-protoc.js"
   }
 }