diff --git a/Gemfile.lock b/Gemfile.lock
index 83bec05..44ffc97 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -91,9 +91,9 @@ GEM
       nokogiri (>= 1.5.9)
     mail (2.6.4)
       mime-types (>= 1.16, < 4)
-    mime-types (3.0)
+    mime-types (3.1)
       mime-types-data (~> 3.2015)
-    mime-types-data (3.2016.0221)
+    mime-types-data (3.2016.0521)
     mini_portile2 (2.0.0)
     minitest (5.9.0)
     nested_form (0.3.2)