diff --git a/backend b/backend
index a1dfc5c..ef4356c 160000
--- a/backend
+++ b/backend
@@ -1 +1 @@
-Subproject commit a1dfc5c461397de490b592ed9e8149e3f9270b9a
+Subproject commit ef4356c391f3e534c63a9dbb18f5c22958eb811e