diff --git a/backend-training/ruby-training/week_one/04/Gemfile.lock b/backend-training/ruby-training/week_one/04/Gemfile.lock
index 2cca050..7e502b7 100644
--- a/backend-training/ruby-training/week_one/04/Gemfile.lock
+++ b/backend-training/ruby-training/week_one/04/Gemfile.lock
@@ -7,7 +7,7 @@ GEM
     github-markup (1.6.2)
     http-cookie (1.0.3)
       domain_name (~> 0.5)
-    json (2.1.0)
+    json (2.3.0)
     method_source (0.9.0)
     mime-types (3.1)
       mime-types-data (~> 3.2015)