diff --git a/Gemfile.lock b/Gemfile.lock
index 356adb2..dd3debd 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -131,7 +131,9 @@ GEM
       mimemagic (~> 0.3.2)
     memoist (0.16.0)
     method_source (0.9.0)
-    mimemagic (0.3.2)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.0)
     mini_portile2 (2.3.0)
     mini_racer (0.1.15)
@@ -247,7 +249,7 @@ GEM
     thor (0.20.0)
     thread_safe (0.3.6)
     tilt (2.0.8)
-    tzinfo (1.2.5)
+    tzinfo (1.2.10)
       thread_safe (~> 0.1)
     uglifier (4.1.10)
       execjs (>= 0.3.0, < 3)