diff --git a/services/calibre-web.nix b/services/calibre-web.nix
index 8148e16..de2621d 100644
--- a/services/calibre-web.nix
+++ b/services/calibre-web.nix
@@ -18,7 +18,7 @@ in {
       locations."/" = {
         proxyPass = "http://[::1]:${toString port}";
         extraConfig = ''
-          client_max_body_size 100M;
+          client_max_body_size 500M;
         '';
       };
     };