diff --git a/HelloWorld/Gemfile.lock b/HelloWorld/Gemfile.lock
index d670ef2..a5b1640 100644
--- a/HelloWorld/Gemfile.lock
+++ b/HelloWorld/Gemfile.lock
@@ -161,7 +161,7 @@ GEM
       trailblazer-option (>= 0.1.1, < 0.2.0)
       uber (< 0.2.0)
     retriable (3.1.2)
-    rexml (3.3.9)
+    rexml (3.4.2)
     rouge (2.0.7)
     ruby2_keywords (0.0.4)
     rubyzip (2.3.2)