diff --git a/.gitignore b/.gitignore
index c80b02e..ece291c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -61,3 +61,5 @@ form-ex1/form-ex1
 form-ex2/form-ex2
 webcounter/webcounter
 authcookie/authcookie
+cert.pem
+key.pem
diff --git a/authcookie/main.go b/authcookie/main.go
index dd1577b..3b00a0e 100644
--- a/authcookie/main.go
+++ b/authcookie/main.go
@@ -72,5 +72,5 @@ func main() {
 	http.HandleFunc("/", app.HomePage)
 	http.HandleFunc("/login", app.LoginPage)
 	http.HandleFunc("/logout", app.LogoutPage)
-	http.ListenAndServe(":9000", nil)
+	http.ListenAndServeTLS(":9443", "../cert.pem", "../key.pem", nil)
 }