diff --git a/Gemfile.lock b/Gemfile.lock
index 317eaf67..01641e0d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -100,7 +100,8 @@ GEM
       http-cookie (>= 1.0.2, < 2.0)
       mime-types (>= 1.16, < 4.0)
       netrc (~> 0.8)
-    rexml (3.2.5)
+    rexml (3.3.6)
+      strscan
     rmagick (2.16.0)
     rss (0.3.1)
       rexml