diff --git a/Gemfile.lock b/Gemfile.lock
index 2e7867b..d9d0425 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -43,7 +43,7 @@ GEM
       faraday (~> 0.6.0)
     hashie (1.0.0)
     i18n (0.5.0)
-    mail (2.2.15)
+    mail (2.2.16)
       activesupport (>= 2.3.6)
       i18n (>= 0.4.0)
       mime-types (~> 1.16)