diff --git a/example/Gemfile.lock b/example/Gemfile.lock
index b2813563..cdd397aa 100644
--- a/example/Gemfile.lock
+++ b/example/Gemfile.lock
@@ -133,7 +133,7 @@ GEM
       ffi (~> 1)
     reline (0.6.0)
       io-console (~> 0.5)
-    rexml (3.4.1)
+    rexml (3.4.2)
     rmagick (6.1.1)
       observer (~> 0.1)
       pkg-config (~> 1.4)