diff --git a/nginx/https_arcsi.conf.template b/nginx/https_arcsi.conf.template
index 6c5b3268..605d51a8 100644
--- a/nginx/https_arcsi.conf.template
+++ b/nginx/https_arcsi.conf.template
@@ -83,7 +83,7 @@ server {
             add_header Access-Control-Allow-Origin '$http_origin' always;
             add_header Access-Control-Allow-Methods 'GET, POST, OPTIONS, PUT, DELETE' always;
             add_header Access-Control-Allow-Credentials 'true' always;
-            add_header Access-Control-Allow-Headers 'Origin,Content-Type,Accept' always;
+            add_header Access-Control-Allow-Headers 'Origin,Content-Type,Accept,Authentication-Token' always;
             add_header Content-Length 0 always;
             add_header Content-Type text/plain always;
             return 204;