diff --git a/Gemfile.lock b/Gemfile.lock
index f8e4c42..7aff07b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -19,7 +19,7 @@ GEM
     rainbow (3.0.0)
     rake (12.3.3)
     regexp_parser (2.1.1)
-    rexml (3.3.9)
+    rexml (3.4.2)
     rspec (3.9.0)
       rspec-core (~> 3.9.0)
       rspec-expectations (~> 3.9.0)