diff --git a/client/nginx.conf b/client/nginx.conf
index bc1f4ee..b7005ca 100644
--- a/client/nginx.conf
+++ b/client/nginx.conf
@@ -22,7 +22,7 @@ server {
   }
   location ~ ^/mistral/(.*)$ {
     proxy_pass https://api.mistral.ai/v1/$1;
-    proxy_set_header Access-Control-Allow-Origin $http_origin 
+    proxy_set_header Access-Control-Allow-Origin "$http_origin"
     proxy_set_header Authorization 'Bearer $MISTRAL_KEY';
     proxy_set_header Accept application/json;
     proxy_set_header Content-Type application/json;