diff --git a/Gemfile.lock b/Gemfile.lock
index dc37724..2e83849 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -46,13 +46,13 @@ GEM
       railties (>= 3.0, < 5.0)
       thor (>= 0.14, < 2.0)
     json (1.8.0)
-    mail (2.5.4)
+    mail (2.5.5)
       mime-types (~> 1.16)
       treetop (~> 1.4.8)
-    mime-types (1.25)
+    mime-types (1.25.1)
     minitest (4.7.5)
     multi_json (1.8.0)
-    polyglot (0.3.3)
+    polyglot (0.3.5)
     rack (1.5.2)
     rack-test (0.6.2)
       rack (>= 1.0)