diff --git a/dnscrypt-proxy/config.go b/dnscrypt-proxy/config.go
index 20d7a521..fec2792a 100644
--- a/dnscrypt-proxy/config.go
+++ b/dnscrypt-proxy/config.go
@@ -38,6 +38,7 @@ type Config struct {
 	LocalDoH                 LocalDoHConfig `toml:"local_doh"`
 	UserName                 string         `toml:"user_name"`
 	ForceTCP                 bool           `toml:"force_tcp"`
+	HTTP3                    bool           `toml:"http3"`
 	Timeout                  int            `toml:"timeout"`
 	KeepAlive                int            `toml:"keepalive"`
 	Proxy                    string         `toml:"proxy"`
@@ -115,6 +116,7 @@ func newConfig() Config {
 		Timeout:                  5000,
 		KeepAlive:                5,
 		CertRefreshDelay:         240,
+		HTTP3:                    false,
 		CertIgnoreTimestamp:      false,
 		EphemeralKeys:            false,
 		Cache:                    true,
@@ -374,6 +376,7 @@ func ConfigLoad(proxy *Proxy, flags *ConfigFlags) error {
 	proxy.xTransport.tlsDisableSessionTickets = config.TLSDisableSessionTickets
 	proxy.xTransport.tlsCipherSuite = config.TLSCipherSuite
 	proxy.xTransport.mainProto = proxy.mainProto
+	proxy.xTransport.http3 = config.HTTP3
 	if len(config.BootstrapResolvers) == 0 && len(config.BootstrapResolversLegacy) > 0 {
 		dlog.Warnf("fallback_resolvers was renamed to bootstrap_resolvers - Please update your configuration")
 		config.BootstrapResolvers = config.BootstrapResolversLegacy
diff --git a/dnscrypt-proxy/proxy.go b/dnscrypt-proxy/proxy.go
index c44ae17b..acd803e8 100644
--- a/dnscrypt-proxy/proxy.go
+++ b/dnscrypt-proxy/proxy.go
@@ -68,6 +68,9 @@ type Proxy struct {
 	nxLogFile                     string
 	proxySecretKey                [32]byte
 	proxyPublicKey                [32]byte
+	ServerNames                   []string
+	DisabledServerNames           []string
+	requiredProps                 stamps.ServerInformalProperties
 	certRefreshDelayAfterFailure  time.Duration
 	timeout                       time.Duration
 	certRefreshDelay              time.Duration
@@ -94,9 +97,6 @@ type Proxy struct {
 	anonDirectCertFallback        bool
 	pluginBlockUndelegated        bool
 	child                         bool
-	requiredProps                 stamps.ServerInformalProperties
-	ServerNames                   []string
-	DisabledServerNames           []string
 	SourceIPv4                    bool
 	SourceIPv6                    bool
 	SourceDNSCrypt                bool
diff --git a/dnscrypt-proxy/xtransport.go b/dnscrypt-proxy/xtransport.go
index 32d802df..aa45aabc 100644
--- a/dnscrypt-proxy/xtransport.go
+++ b/dnscrypt-proxy/xtransport.go
@@ -64,6 +64,7 @@ type XTransport struct {
 	ignoreSystemDNS          bool
 	useIPv4                  bool
 	useIPv6                  bool
+	http3                    bool
 	tlsDisableSessionTickets bool
 	tlsCipherSuite           []uint16
 	proxyDialer              *netproxy.Dialer
@@ -221,8 +222,10 @@ func (xTransport *XTransport) rebuildTransport() {
 		http2Transport.AllowHTTP = false
 	}
 	xTransport.transport = transport
-	h3Transport := &http3.RoundTripper{DisableCompression: true, TLSClientConfig: &tlsClientConfig}
-	xTransport.h3Transport = h3Transport
+	if xTransport.http3 {
+		h3Transport := &http3.RoundTripper{DisableCompression: true, TLSClientConfig: &tlsClientConfig}
+		xTransport.h3Transport = h3Transport
+	}
 }
 
 func (xTransport *XTransport) resolveUsingSystem(host string) (ip net.IP, ttl time.Duration, err error) {
@@ -395,13 +398,16 @@ func (xTransport *XTransport) Fetch(
 		Timeout:   timeout,
 	}
 	host, port := ExtractHostAndPort(url.Host, 443)
-	xTransport.altSupport.RLock()
-	altPort, hasAltSupport := xTransport.altSupport.cache[url.Host]
-	xTransport.altSupport.RUnlock()
-	if hasAltSupport {
-		if int(altPort) == port {
-			client.Transport = xTransport.h3Transport
-			dlog.Debugf("Using HTTP/3 transport for [%s]", url.Host)
+	hasAltSupport := false
+	if xTransport.h3Transport != nil {
+		xTransport.altSupport.RLock()
+		altPort, hasAltSupport := xTransport.altSupport.cache[url.Host]
+		xTransport.altSupport.RUnlock()
+		if hasAltSupport {
+			if int(altPort) == port {
+				client.Transport = xTransport.h3Transport
+				dlog.Debugf("Using HTTP/3 transport for [%s]", url.Host)
+			}
 		}
 	}
 	header := map[string][]string{"User-Agent": {"dnscrypt-proxy"}}
@@ -467,7 +473,7 @@ func (xTransport *XTransport) Fetch(
 		}
 		return nil, statusCode, nil, rtt, err
 	}
-	if !hasAltSupport {
+	if xTransport.h3Transport != nil && !hasAltSupport {
 		if alt, found := resp.Header["Alt-Svc"]; found {
 			dlog.Debugf("Alt-Svc [%s]: [%s]", url.Host, alt)
 			altPort := uint16(port)