diff --git a/back-end/Gemfile.lock b/back-end/Gemfile.lock
index cc495c2..18ea6eb 100644
--- a/back-end/Gemfile.lock
+++ b/back-end/Gemfile.lock
@@ -171,7 +171,7 @@ GEM
     ssrf_filter (1.0.7)
     thor (1.1.0)
     thread_safe (0.3.6)
-    tzinfo (1.2.9)
+    tzinfo (1.2.10)
       thread_safe (~> 0.1)
     websocket-driver (0.7.5)
       websocket-extensions (>= 0.1.0)