diff --git a/modules/backend b/modules/backend
index 6594e1d2..646dc576 160000
--- a/modules/backend
+++ b/modules/backend
@@ -1 +1 @@
-Subproject commit 6594e1d21b20abe879d7ba9bdbdd019cf5b28552
+Subproject commit 646dc57673c972fb8041ca06e52e803576f5005d