diff --git a/DotNetCasClient/CasAuthentication.cs b/DotNetCasClient/CasAuthentication.cs
index 357cf9d..11424f4 100644
--- a/DotNetCasClient/CasAuthentication.cs
+++ b/DotNetCasClient/CasAuthentication.cs
@@ -737,13 +737,13 @@ internal static void ProcessSingleSignOutRequest()
 
             protoLogger.Debug("Examining request for single sign-out signature");
 
-            if (request.HttpMethod == "POST" && request.Form["logoutRequest"] != null)
+            if (request.HttpMethod == "POST" && request.Unvalidated.Form["logoutRequest"] != null)
             {
                 protoLogger.Debug("Attempting to get CAS service ticket from request");
                 // TODO: Should we be checking to make sure that this special POST is coming from a trusted source?
                 //       It would be tricky to do this by IP address because there might be a white list or something.
                 
-                string casTicket = ExtractSingleSignOutTicketFromSamlResponse(request.Params["logoutRequest"]);
+                string casTicket = ExtractSingleSignOutTicketFromSamlResponse(request.Unvalidated.Form["logoutRequest"]);
                 if (!String.IsNullOrEmpty(casTicket))
                 {
                     protoLogger.Info("Processing single sign-out request for " + casTicket);