diff --git a/modules/nixos/deertopia/webdav.nix b/modules/nixos/deertopia/webdav.nix
index cf82578..300430a 100644
--- a/modules/nixos/deertopia/webdav.nix
+++ b/modules/nixos/deertopia/webdav.nix
@@ -98,6 +98,9 @@ in {
           # See previous note regarding the HTTPS -> HTTP redirection.
           proxy_set_header Destination $http_destination_webdav;
 
+          # Increase limit of upload sizes.
+          client_max_body_size 20G;
+
           proxy_pass "http://localhost:${builtins.toString cfg.port}";
         '';
       };