diff --git a/Gemfile.lock b/Gemfile.lock
index 34a18e1..64a9f94 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -112,7 +112,7 @@ GEM
       actionpack (>= 3.1)
       less (~> 2.5.0)
     libv8 (3.16.14.7)
-    mail (2.5.4)
+    mail (2.5.5)
       mime-types (~> 1.16)
       treetop (~> 1.4.8)
     mime-types (1.25.1)