diff --git a/Gemfile.lock b/Gemfile.lock
index cf42b9a..9c012a7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -27,7 +27,7 @@ GEM
     rainbow (3.1.1)
     rake (12.3.3)
     regexp_parser (2.9.2)
-    rexml (3.3.3)
+    rexml (3.3.6)
       strscan
     rspec (3.8.0)
       rspec-core (~> 3.8.0)