diff --git a/project/core/util/HttpWrapper.cs b/project/core/util/HttpWrapper.cs
index 57818901e..973253e47 100644
--- a/project/core/util/HttpWrapper.cs
+++ b/project/core/util/HttpWrapper.cs
@@ -21,6 +21,7 @@ public virtual DateTime GetLastModifiedTimeFor(Uri url, DateTime previousModifie
 			HttpWebRequest request = (HttpWebRequest) WebRequest.Create(url);
 			request.ProtocolVersion = HttpVersion.Version11;
 			request.IfModifiedSince = previousModifiedTime;
+            request.Credentials = CredentialCache.DefaultCredentials;
 
 			try
 			{