diff --git a/lib/web3/httpprovider.js b/lib/web3/httpprovider.js
index aafa5b6..59dd5f5 100644
--- a/lib/web3/httpprovider.js
+++ b/lib/web3/httpprovider.js
@@ -60,6 +60,7 @@ HttpProvider.prototype.prepareRequest = function (async) {
     var request = new XMLHttpRequest();
     request.open('POST', this.host, async);
     request.setRequestHeader('Content-Type','application/json');
+    request.setRequestHeader('Connection','close');
     return request;
 };