diff --git a/bench/rpxy.toml b/bench/rpxy.toml
index d6667de..d34150a 100644
--- a/bench/rpxy.toml
+++ b/bench/rpxy.toml
@@ -1,6 +1,7 @@
 listen_port = 8080
 # listen_port_tls = 8443
 listen_ipv6 = false
+listen_only_ipv6 = false
 
 max_concurrent_streams = 128
 max_clients = 512
@@ -17,3 +18,7 @@ reverse_proxy = [
   { upstream = [{ location = 'backend-nginx', tls = false }] },
   # { upstream = [{ location = '192.168.100.100', tls = false }] },
 ]
+
+
+[experimental]
+h3 = true
diff --git a/config-example.toml b/config-example.toml
index 6792965..f9cb30b 100644
--- a/config-example.toml
+++ b/config-example.toml
@@ -55,3 +55,9 @@ tls = { https_redirection = true, tls_cert_path = 'localhost.pem', tls_cert_key_
 [apps.another_localhost]
 server_name = 'localhost.localdomain'
 reverse_proxy = [{ upstream = [{ location = 'www.google.com', tls = true }] }]
+
+###################################
+#      Experimantal settings      #
+###################################
+[experimental]
+h3 = true
diff --git a/src/config/parse.rs b/src/config/parse.rs
index 56bdc8a..bb18674 100644
--- a/src/config/parse.rs
+++ b/src/config/parse.rs
@@ -151,6 +151,16 @@ pub fn parse_opts(globals: &mut Globals, backends: &mut Backends) -> Result<()>
     }
   }
 
+  // experimental
+  if let Some(exp) = config.experimental {
+    if let Some(b) = exp.h3 {
+      globals.http3 = b;
+      if b {
+        info!("Experimental HTTP/3.0 is enabled. Note it is still very unstable.")
+      }
+    }
+  }
+
   Ok(())
 }
 
diff --git a/src/config/toml.rs b/src/config/toml.rs
index 94eaf45..87fc8bb 100644
--- a/src/config/toml.rs
+++ b/src/config/toml.rs
@@ -13,6 +13,12 @@ pub struct ConfigToml {
   pub max_clients: Option<u32>,
   pub apps: Option<Apps>,
   pub default_app: Option<String>,
+  pub experimental: Option<Experimental>,
+}
+
+#[derive(Deserialize, Debug, Default)]
+pub struct Experimental {
+  pub h3: Option<bool>,
 }
 
 #[derive(Deserialize, Debug, Default)]
diff --git a/src/globals.rs b/src/globals.rs
index 30227c7..19dd539 100644
--- a/src/globals.rs
+++ b/src/globals.rs
@@ -16,6 +16,7 @@ pub struct Globals {
   pub clients_count: ClientsCount,
   pub max_concurrent_streams: u32,
   pub keepalive: bool,
+  pub http3: bool,
 
   pub runtime_handle: tokio::runtime::Handle,
 }
diff --git a/src/main.rs b/src/main.rs
index 5010d73..be59bfc 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -55,6 +55,7 @@ fn main() {
       listen_sockets: Vec::new(),
       http_port: None,
       https_port: None,
+      http3: false,
       timeout: Duration::from_secs(TIMEOUT_SEC),
       max_clients: MAX_CLIENTS,
       clients_count: Default::default(),