diff --git a/backend b/backend
index 2134ff9..a4b1b2f 160000
--- a/backend
+++ b/backend
@@ -1 +1 @@
-Subproject commit 2134ff98e54feba18b823dcc390967e9bbda5ffa
+Subproject commit a4b1b2fd34e6191593edc215b03633127171a9f1