diff --git a/cdmm/Gemfile.lock b/cdmm/Gemfile.lock
index 4f1569f..b683a2d 100644
--- a/cdmm/Gemfile.lock
+++ b/cdmm/Gemfile.lock
@@ -232,7 +232,7 @@ GEM
     regexp_parser (2.9.2)
     reline (0.5.10)
       io-console (~> 0.5)
-    rexml (3.3.8)
+    rexml (3.3.9)
     rmagick (6.0.1)
       observer (~> 0.1)
       pkg-config (~> 1.4)