diff --git a/Gemfile.lock b/Gemfile.lock
index 755b113..9f858ed 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -90,7 +90,9 @@ GEM
       mime-types (~> 1.16)
       treetop (~> 1.4.8)
     mime-types (1.19)
-    mimemagic (0.1.8)
+    mimemagic (0.4.3)
+      nokogiri (~> 1)
+      rake
     mongo (1.7.0)
       bson (~> 1.7.0)
     mongoid (2.5.0)
@@ -166,7 +168,7 @@ GEM
     treetop (1.4.10)
       polyglot
       polyglot (>= 0.3.1)
-    tzinfo (0.3.33)
+    tzinfo (0.3.61)
     warden (1.2.1)
       rack (>= 1.0)
     webrat (0.7.3)