diff --git a/rails_projects/first_app/Gemfile.lock b/rails_projects/first_app/Gemfile.lock
index 1bfb908..8d296b8 100644
--- a/rails_projects/first_app/Gemfile.lock
+++ b/rails_projects/first_app/Gemfile.lock
@@ -103,7 +103,7 @@ GEM
       polyglot (>= 0.3.1)
     turbolinks (1.1.1)
       coffee-rails
-    tzinfo (0.3.44)
+    tzinfo (0.3.61)
     uglifier (2.1.1)
       execjs (>= 0.3.0)
       multi_json (~> 1.0, >= 1.0.2)