diff --git a/Gemfile.lock b/Gemfile.lock
index 293da41..d0e1ce6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -33,7 +33,7 @@ GEM
     regexp_parser (2.9.2)
     reline (0.3.1)
       io-console (~> 0.5)
-    rexml (3.3.8)
+    rexml (3.3.9)
     rubocop (1.28.2)
       parallel (~> 1.10)
       parser (>= 3.1.0.0)