diff --git a/security/openssl/Cargo.toml b/security/openssl/Cargo.toml
index 85c3b15d..2b8fa347 100644
--- a/security/openssl/Cargo.toml
+++ b/security/openssl/Cargo.toml
@@ -2,9 +2,9 @@
 name = "openssl-example"
 version = "0.2.0"
 authors = ["Nikolay Kim <fafhrd91@gmail.com>"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]
-actix-web = { version = "3", features = ["openssl"] }
-env_logger = "0.8"
+actix-web = { version = "4.0.0-beta.21", features = ["openssl"] }
+env_logger = "0.9"
 openssl = "0.10"
diff --git a/security/openssl/src/main.rs b/security/openssl/src/main.rs
index d2c679be..6a0cab4d 100644
--- a/security/openssl/src/main.rs
+++ b/security/openssl/src/main.rs
@@ -34,7 +34,7 @@ async fn main() -> io::Result<()> {
             // with path parameters
             .service(web::resource("/").route(web::get().to(|| {
                 HttpResponse::Found()
-                    .header("LOCATION", "/index.html")
+                    .append_header(("LOCATION", "/index.html"))
                     .finish()
             })))
     })