diff --git a/Gemfile.lock b/Gemfile.lock
index 99f444f..c9e67d3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -64,11 +64,10 @@ GEM
       actionpack (>= 3.1)
       less (~> 2.3.1)
     libv8 (3.11.8.17)
-    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)
     multi_json (1.7.2)
     multipart-post (1.2.0)
     oauth (0.4.7)
@@ -82,7 +81,7 @@ GEM
       multi_json (~> 1.3)
       omniauth-oauth (~> 1.0)
     pg (0.15.1)
-    polyglot (0.3.3)
+    polyglot (0.3.5)
     rack (1.4.5)
     rack-cache (1.2)
       rack (>= 0.4)
@@ -125,7 +124,7 @@ GEM
       ref
     thor (0.18.1)
     tilt (1.3.7)
-    treetop (1.4.12)
+    treetop (1.4.15)
       polyglot
       polyglot (>= 0.3.1)
     twitter (4.6.2)