diff --git a/PushSharp.Apple/ApnsConnection.cs b/PushSharp.Apple/ApnsConnection.cs
index 8a8d553b..6884f44b 100644
--- a/PushSharp.Apple/ApnsConnection.cs
+++ b/PushSharp.Apple/ApnsConnection.cs
@@ -402,7 +402,8 @@ async Task connect ()
                     (sender, targetHost, localCerts, remoteCert, acceptableIssuers) => certificate);
 
                 try {
-                    stream.AuthenticateAsClient (Configuration.Host, certificates, System.Security.Authentication.SslProtocols.Tls, false);
+					var tls = System.Security.Authentication.SslProtocols.Tls | System.Security.Authentication.SslProtocols.Tls11 | System.Security.Authentication.SslProtocols.Tls12;
+					stream.AuthenticateAsClient (Configuration.Host, certificates, tls, false);
                 } catch (System.Security.Authentication.AuthenticationException ex) {
                     throw new ApnsConnectionException ("SSL Stream Failed to Authenticate as Client", ex);
                 }
diff --git a/PushSharp.Apple/ApnsFeedbackService.cs b/PushSharp.Apple/ApnsFeedbackService.cs
index 53659ac9..6859bef0 100644
--- a/PushSharp.Apple/ApnsFeedbackService.cs
+++ b/PushSharp.Apple/ApnsFeedbackService.cs
@@ -57,7 +57,8 @@ public IEnumerable<ApnsTokeExpirationInfo> GetTokenExpirations()
                 (sender, cert, chain, sslErrs) => { return true; },
                 (sender, targetHost, localCerts, remoteCert, acceptableIssuers) => { return certificate; });
 
-            stream.AuthenticateAsClient(Configuration.FeedbackHost, certificates, System.Security.Authentication.SslProtocols.Tls, false);
+			var tls = System.Security.Authentication.SslProtocols.Tls | System.Security.Authentication.SslProtocols.Tls11 | System.Security.Authentication.SslProtocols.Tls12;
+			stream.AuthenticateAsClient(Configuration.FeedbackHost, certificates, tls, false);
 
 
             //Set up