diff --git a/Training/to_do_list/Gemfile.lock b/Training/to_do_list/Gemfile.lock
index 1af2011..1c64f22 100644
--- a/Training/to_do_list/Gemfile.lock
+++ b/Training/to_do_list/Gemfile.lock
@@ -106,7 +106,7 @@ GEM
       mini_portile2 (~> 2.4.0)
     public_suffix (4.0.4)
     puma (3.12.4)
-    rack (2.2.2)
+    rack (2.2.6.2)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.2.4.2)