diff --git a/doc/nginx-example.conf b/doc/nginx-example.conf
index aae6424..3d2e2e3 100644
--- a/doc/nginx-example.conf
+++ b/doc/nginx-example.conf
@@ -28,7 +28,7 @@ server {
         fastcgi_param GITEA2RSS_BASEURL "https://git.example.com";
 
         fastcgi_cache gitea2rss;
-        fastcgi_cache_valid 200 20m; # Cache answers for up to 20 minutes.
+        fastcgi_cache_valid 200 10m; # Cache answers for up to 10 minutes.
         fastcgi_cache_lock on;  # Relay only one identical request at a time.
     }
 }