diff --git a/Gemfile.lock b/Gemfile.lock
index 172c375e..29059789 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -282,7 +282,9 @@ GEM
     mime-types (3.1)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2016.0521)
-    mimemagic (0.3.2)
+    mimemagic (0.4.3)
+      nokogiri (~> 1)
+      rake
     mini_magick (4.8.0)
     mini_mime (1.0.0)
     mini_portile2 (2.3.0)
@@ -485,7 +487,7 @@ GEM
       camertron-eprun
       cldr-plurals-runtime-rb (~> 1.0)
       tzinfo
-    tzinfo (1.2.5)
+    tzinfo (1.2.10)
       thread_safe (~> 0.1)
     uglifier (4.0.2)
       execjs (>= 0.3.0, < 3)