diff --git a/ruby/v4/Gemfile.lock b/ruby/v4/Gemfile.lock
index ff8aab8..d289e62 100644
--- a/ruby/v4/Gemfile.lock
+++ b/ruby/v4/Gemfile.lock
@@ -59,7 +59,7 @@ GEM
       trailblazer-option (>= 0.1.1, < 0.2.0)
       uber (< 0.2.0)
     retriable (3.1.2)
-    rexml (3.2.5)
+    rexml (3.3.9)
     ruby2_keywords (0.0.5)
     signet (0.16.1)
       addressable (~> 2.8)