diff --git a/frontend-training/html-css-training/week_one/06/lesson/Gemfile.lock b/frontend-training/html-css-training/week_one/06/lesson/Gemfile.lock
index 2af0e2b..0c30a2d 100644
--- a/frontend-training/html-css-training/week_one/06/lesson/Gemfile.lock
+++ b/frontend-training/html-css-training/week_one/06/lesson/Gemfile.lock
@@ -90,7 +90,7 @@ GEM
     thor (0.20.3)
     thread_safe (0.3.6)
     tilt (2.0.9)
-    tzinfo (1.2.5)
+    tzinfo (1.2.10)
       thread_safe (~> 0.1)
     uglifier (3.2.0)
       execjs (>= 0.3.0, < 3)