diff --git a/backend/Gemfile.lock b/backend/Gemfile.lock
index ba7c846..3ce91cf 100644
--- a/backend/Gemfile.lock
+++ b/backend/Gemfile.lock
@@ -150,7 +150,7 @@ GEM
     sqlite3 (1.4.2)
     thor (1.0.1)
     thread_safe (0.3.6)
-    tzinfo (1.2.6)
+    tzinfo (1.2.10)
       thread_safe (~> 0.1)
     websocket-driver (0.7.1)
       websocket-extensions (>= 0.1.0)