diff --git a/package.json b/package.json
index 9b8b3f37..1e08b528 100644
--- a/package.json
+++ b/package.json
@@ -37,7 +37,8 @@
   },
   "homepage": "https://github.com/amark/gun#readme",
   "engines": {
-    "node": "~>0.6.6"
+    "node": ">=0.6.6",
+    "iojs": ">=0.0.1"
   },
   "dependencies": {
     "aws-sdk": "~>2.0.0",