diff --git a/v2.4-non-rails/Gemfile.lock b/v2.4-non-rails/Gemfile.lock
index f60d06c..3e4a1d3 100644
--- a/v2.4-non-rails/Gemfile.lock
+++ b/v2.4-non-rails/Gemfile.lock
@@ -42,7 +42,7 @@ GEM
     mini_portile2 (2.8.7)
     minitest (5.25.1)
     rake (13.2.1)
-    rexml (3.3.8)
+    rexml (3.3.9)
     rspec (3.13.0)
       rspec-core (~> 3.13.0)
       rspec-expectations (~> 3.13.0)