diff --git a/Gemfile.lock b/Gemfile.lock
index 8adb058..1f1762b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -164,7 +164,7 @@ GEM
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     regexp_parser (2.0.0)
-    rexml (3.2.4)
+    rexml (3.3.9)
     rubocop (1.4.2)
       parallel (~> 1.10)
       parser (>= 2.7.1.5)