diff --git a/package.json b/package.json
index fe6dd31e6..eb524b045 100755
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
   "optionalDependencies": {
     "tough-cookie": ">=0.12.0",
     "form-data": "~0.1.0",
-    "tunnel-agent": "~0.3.0",
+    "tunnel-agent": "~0.4.0",
     "http-signature": "~0.10.0",
     "oauth-sign": "~0.3.0",
     "hawk": "~1.0.0",