# Microsoft.AspNetCore.Server.Kestrel.Core

``` diff
 namespace Microsoft.AspNetCore.Server.Kestrel.Core {
     [FlagsAttribute]
     public enum HttpProtocols {
-        [RequiresPreviewFeaturesAttribute]
-        Http1AndHttp2AndHttp3 = 7,
+        Http1AndHttp2AndHttp3 = 7,
-        [RequiresPreviewFeaturesAttribute]
-        Http3 = 4,
+        Http3 = 4,
     }
 }
```

