diff --git a/Gemfile.lock b/Gemfile.lock
index 5244b26..1d4ae16 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -45,12 +45,12 @@ GEM
     journey (1.0.4)
     json (1.8.0)
     json_pure (1.8.0)
-    mail (2.5.4)
+    mail (2.5.5)
       mime-types (~> 1.16)
       treetop (~> 1.4.8)
-    mime-types (1.23)
+    mime-types (1.25.1)
     multi_json (1.7.7)
-    polyglot (0.3.3)
+    polyglot (0.3.5)
     rack (1.4.5)
     rack-cache (1.2)
       rack (>= 0.4)
@@ -98,7 +98,7 @@ GEM
       tilt (~> 1.1, != 1.3.0)
     thor (0.18.1)
     tilt (1.4.1)
-    treetop (1.4.14)
+    treetop (1.4.15)
       polyglot
       polyglot (>= 0.3.1)
     tzinfo (0.3.37)