diff --git a/Gemfile.lock b/Gemfile.lock
index 6efeb49..4ac49c4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -98,11 +98,10 @@ GEM
     json (1.7.7)
     launchy (2.2.0)
       addressable (~> 2.3)
-    mail (2.5.3)
-      i18n (>= 0.4.0)
+    mail (2.5.5)
       mime-types (~> 1.16)
       treetop (~> 1.4.8)
-    mime-types (1.22)
+    mime-types (1.25.1)
     mongoid (3.1.2)
       activemodel (~> 3.2)
       moped (~> 1.4.2)
@@ -117,7 +116,7 @@ GEM
     nokogiri (1.5.9)
     origin (1.0.11)
     orm_adapter (0.4.0)
-    polyglot (0.3.3)
+    polyglot (0.3.5)
     quiet_assets (1.0.2)
       railties (>= 3.1, < 5.0)
     rack (1.4.5)
@@ -178,7 +177,7 @@ GEM
       tilt (~> 1.1, != 1.3.0)
     thor (0.18.1)
     tilt (1.3.6)
-    treetop (1.4.12)
+    treetop (1.4.15)
       polyglot
       polyglot (>= 0.3.1)
     tzinfo (0.3.37)