diff --git a/roles/keycloak/templates/nginx.d.conf.j2 b/roles/keycloak/templates/nginx.d.conf.j2
index 2d71a2f0df91115db0aeb7798e3245fc7c91ca45..02cc2b3c1239b56d06b779a0e7af60530d0f473d 100644
--- a/roles/keycloak/templates/nginx.d.conf.j2
+++ b/roles/keycloak/templates/nginx.d.conf.j2
@@ -56,6 +56,7 @@ server {
         proxy_set_header    X-Forwarded-For    $remote_addr;
         proxy_set_header    X-Forwarded-Proto  $scheme;
         proxy_pass http://127.0.0.1:{{ keycloak_port }};
+        proxy_buffer_size 8k;
     }
 
     location = / {