diff --git a/Gemfile.lock b/Gemfile.lock
index ec104a6..d8a5211 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -90,9 +90,11 @@ GEM
       activesupport (>= 3.0.0)
     loofah (2.0.3)
       nokogiri (>= 1.5.9)
-    mail (2.6.3)
-      mime-types (>= 1.16, < 3)
-    mime-types (2.99.1)
+    mail (2.6.4)
+      mime-types (>= 1.16, < 4)
+    mime-types (3.0)
+      mime-types-data (~> 3.2015)
+    mime-types-data (3.2016.0221)
     mini_portile2 (2.0.0)
     minitest (5.8.4)
     nested_form (0.3.2)