diff --git a/Gemfile.lock b/Gemfile.lock
index 04a8d24..3a66f33 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -85,7 +85,7 @@ GEM
     netrc (0.11.0)
     nkf (0.2.0)
     public_suffix (4.0.7)
-    rexml (3.3.7)
+    rexml (3.3.9)
     ruby-macho (2.5.1)
     securerandom (0.3.1)
     typhoeus (1.4.1)