diff --git a/examples/server/src/ssl.rs b/examples/server/src/ssl.rs
index 08f9ce1..4efb8de 100644
--- a/examples/server/src/ssl.rs
+++ b/examples/server/src/ssl.rs
@@ -8,6 +8,8 @@ fn index(_req: HttpRequest) -> impl Responder {
 
 pub fn main() {
     // load ssl keys
+    // to create a self-signed temporary cert for testing:
+    // `openssl req -x509 -newkey rsa:4096 -nodes -keyout key.pem -out cert.pem -days 365 -subj '/CN=localhost'`
     let mut builder =
         SslAcceptor::mozilla_intermediate(SslMethod::tls()).unwrap();
     builder