diff --git a/OrbitalBeat.go b/OrbitalBeat.go
index 18e64e7..6cfa51c 100644
--- a/OrbitalBeat.go
+++ b/OrbitalBeat.go
@@ -772,6 +772,8 @@ func main() {
 
 	debugOption := flag.Bool("debug", false, "Output debug information.")
 
+	http3Option := flag.Bool("http3", false, "Enable HTTP/3")
+
 	signatureCacheLimitOption := flag.Int("siglimit", 4096, "Maximum number of lingering valid signature cache results.")
 
 	flag.Parse()
@@ -916,42 +918,45 @@ func main() {
 		}
 	}(&wg)
 
-	wg.Add(1)
-	go func(wg *sync.WaitGroup) {
-		defer wg.Done()
+	if *http3Option {
 
-		server := &http3.Server{
-			Server: &http.Server{
-				Addr: *listenAddress,
-				TLSConfig: &tls.Config{
-					GetCertificate: func(info *tls.ClientHelloInfo) (*tls.Certificate, error) {
-						if isSNIAllowed(info.ServerName) {
-							return &serverCertificate, nil
-						}
-						return &bogusCertificate, nil
+		wg.Add(1)
+		go func(wg *sync.WaitGroup) {
+			defer wg.Done()
+
+			server := &http3.Server{
+				Server: &http.Server{
+					Addr: *listenAddress,
+					TLSConfig: &tls.Config{
+						GetCertificate: func(info *tls.ClientHelloInfo) (*tls.Certificate, error) {
+							if isSNIAllowed(info.ServerName) {
+								return &serverCertificate, nil
+							}
+							return &bogusCertificate, nil
+						},
 					},
+					Handler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+						if debugOutput {
+							log.Print("Received HTTP/3 request")
+						}
+						handle(NewRequestContextFromHttp(w, r))
+					}),
 				},
-				Handler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-					if debugOutput {
-						log.Print("Received HTTP/3 request")
-					}
-					handle(NewRequestContextFromHttp(w, r))
-				}),
-			},
-		}
+			}
 
-		h := http.Header{}
-		server.SetQuicHeaders(h)
-		extraHeadersMutex.Lock()
-		extraHeaders["Alt-Svc"] = h.Get("Alt-Svc")
-		extraHeadersMutex.Unlock()
+			h := http.Header{}
+			server.SetQuicHeaders(h)
+			extraHeadersMutex.Lock()
+			extraHeaders["Alt-Svc"] = h.Get("Alt-Svc")
+			extraHeadersMutex.Unlock()
 
-		log.Printf("Serving UDP on %s", *listenAddress)
-		err = server.ListenAndServe()
-		if err != nil {
-			log.Panic(err)
-		}
-	}(&wg)
+			log.Printf("Serving UDP on %s", *listenAddress)
+			err = server.ListenAndServe()
+			if err != nil {
+				log.Panic(err)
+			}
+		}(&wg)
 
+	}
 	wg.Wait()
 }