diff --git a/Gemfile.lock b/Gemfile.lock
index 35785272..df512f77 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -100,7 +100,7 @@ GEM
     open4 (1.3.4)
     public_suffix (4.0.7)
     redcarpet (3.6.0)
-    rexml (3.3.9)
+    rexml (3.4.2)
     rouge (4.2.0)
     ruby-macho (2.5.1)
     ruby2_keywords (0.0.5)