diff --git a/package.json b/package.json
index 0c817c5..c93c36d 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "anyproxy",
-  "version": "2.8.9",
+  "version": "2.8.10",
   "description": "A fully configurable proxy in NodeJS, which can handle HTTPS requests perfectly.",
   "main": "proxy.js",
   "bin": {
@@ -24,6 +24,7 @@
     "test": "nodeunit test.js"
   },
   "optionalDependencies":{
+    "underscore":"^1.7.0",
     "cookie":"^0.1.2",
     "mysql":"^2.5.2",
     "iconv-lite": "^0.4.4",