diff --git a/Gemfile.lock b/Gemfile.lock
index 66dfdbd..3d3095a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -97,11 +97,11 @@ GEM
       thor (>= 0.14, < 2.0)
     launchy (2.3.0)
       addressable (~> 2.3)
-    mail (2.5.4)
+    mail (2.5.5)
       mime-types (~> 1.16)
       treetop (~> 1.4.8)
     method_source (0.8.2)
-    mime-types (1.23)
+    mime-types (1.25.1)
     mini_portile (0.5.0)
     minitest (4.7.5)
     multi_json (1.7.7)
@@ -112,7 +112,7 @@ GEM
       capybara (~> 2.1.0)
       faye-websocket (>= 0.4.4, < 0.5.0)
       http_parser.rb (~> 0.5.3)
-    polyglot (0.3.3)
+    polyglot (0.3.5)
     pry (0.9.12.6)
       coderay (~> 1.0)
       method_source (~> 0.8)
@@ -167,7 +167,7 @@ GEM
     thread_safe (0.1.0)
       atomic
     tilt (1.4.1)
-    treetop (1.4.14)
+    treetop (1.4.15)
       polyglot
       polyglot (>= 0.3.1)
     tzinfo (0.3.37)