diff --git a/web/conf/nginx.conf b/web/conf/nginx.conf
index f5ee835..18cc7cd 100644
--- a/web/conf/nginx.conf
+++ b/web/conf/nginx.conf
@@ -25,7 +25,7 @@ server {
 
     set $cache_control "no-cache";
 
-    if ($request_uri ~ "^/(?:msg\.html)?(?:\?.*)?$") {
+    if ($uri = /msg.html) {
       set $cache_control "no-store";
     }