diff --git a/mRemoteV1/Connection/Protocol/VNC/Connection.Protocol.VNC.cs b/mRemoteV1/Connection/Protocol/VNC/Connection.Protocol.VNC.cs
index 255628b50..89cc45f39 100644
--- a/mRemoteV1/Connection/Protocol/VNC/Connection.Protocol.VNC.cs
+++ b/mRemoteV1/Connection/Protocol/VNC/Connection.Protocol.VNC.cs
@@ -72,7 +72,7 @@ namespace mRemoteNG.Connection.Protocol.VNC
             SetEventHandlers();
             try
             {
-                if (TestConnect(_info.Hostname, _info.Port, 150))
+                if (TestConnect(_info.Hostname, _info.Port, 500))
                     _vnc.Connect(_info.Hostname, _info.VNCViewOnly, _info.VNCSmartSizeMode != SmartSizeMode.SmartSNo);
             }
             catch (Exception ex)
@@ -359,4 +359,4 @@ namespace mRemoteNG.Connection.Protocol.VNC
 
         #endregion
     }
-}
\ No newline at end of file
+}