diff --git a/README.md b/README.md
index 5d87da6..f89ba68 100644
--- a/README.md
+++ b/README.md
@@ -85,6 +85,7 @@ async fn main() {
         Some(root_cert),
         // This is the connector that will be used to connect to the upstream server from proxy
         tokio_native_tls::native_tls::TlsConnector::builder()
+            // You must set ALPN if you want to support HTTP/2
             .request_alpns(&["h2", "http/1.1"])
             .build()
             .unwrap(),
diff --git a/examples/dev_proxy.rs b/examples/dev_proxy.rs
index e82c066..dc040a3 100644
--- a/examples/dev_proxy.rs
+++ b/examples/dev_proxy.rs
@@ -76,6 +76,7 @@ async fn main() {
         Some(root_cert),
         // This is the connector that will be used to connect to the upstream server from proxy
         tokio_native_tls::native_tls::TlsConnector::builder()
+            // You must set ALPN if you want to support HTTP/2
             .request_alpns(&["h2", "http/1.1"])
             .build()
             .unwrap(),
diff --git a/examples/proxy.rs b/examples/proxy.rs
index e021d91..4dee3fd 100644
--- a/examples/proxy.rs
+++ b/examples/proxy.rs
@@ -72,6 +72,7 @@ async fn main() {
         Some(root_cert),
         // This is the connector that will be used to connect to the upstream server from proxy
         tokio_native_tls::native_tls::TlsConnector::builder()
+            // You must set ALPN if you want to support HTTP/2
             .request_alpns(&["h2", "http/1.1"])
             .build()
             .unwrap(),