diff --git a/Gemfile.lock b/Gemfile.lock
index a792e79..96f0cf7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -154,7 +154,7 @@ GEM
     loofah (2.0.3)
       nokogiri (>= 1.5.9)
     lumberjack (1.0.12)
-    mail (2.6.5)
+    mail (2.6.6)
       mime-types (>= 1.16, < 4)
     mailcatcher (0.6.5)
       eventmachine (= 1.0.9.1)