diff --git a/Gemfile.lock b/Gemfile.lock
index 3a45895..5888016 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -136,8 +136,7 @@ GEM
       addressable (~> 2.3)
     letter_opener (1.1.0)
       launchy (~> 2.2.0)
-    mail (2.5.3)
-      i18n (>= 0.4.0)
+    mail (2.5.5)
       mime-types (~> 1.16)
       treetop (~> 1.4.8)
     meta_request (0.3.4)
@@ -194,7 +193,7 @@ GEM
       railties (~> 3.0)
     parallel (0.6.4)
     pg (0.18.1)
-    polyglot (0.3.3)
+    polyglot (0.3.5)
     postrank-uri (1.0.17)
       addressable (~> 2.3.0)
       nokogiri (~> 1.5.5)
@@ -300,7 +299,7 @@ GEM
       atomic
     tilt (1.3.7)
     timers (1.1.0)
-    treetop (1.4.12)
+    treetop (1.4.15)
       polyglot
       polyglot (>= 0.3.1)
     turn (0.9.6)