diff --git a/conf/passbolt.conf b/conf/passbolt.conf
index af68783..d51883d 100644
--- a/conf/passbolt.conf
+++ b/conf/passbolt.conf
@@ -58,7 +58,6 @@ server {
   ssl_ciphers ECDH+AESGCM:DH+AESGCM:ECDH+AES256:DH+AES256:ECDH+AES128:DH+AES:ECDH+3DES:DH+3DES:RSA+AESGCM:RSA+AES:RSA+3DES:!aNULL:!MD5:!DSS;
   ssl_session_tickets off;
   add_header Strict-Transport-Security "max-age=63072000; includeSubdomains; preload";
-  add_header Strict-Transport-Security "max-age=63072000; includeSubdomains";
   add_header X-Frame-Options DENY;
   add_header X-Content-Type-Options nosniff;