diff --git a/Gemfile.lock b/Gemfile.lock
index b1c670d..e9a6b18 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -190,7 +190,9 @@ GEM
       mimemagic (~> 0.3.2)
     method_source (1.0.0)
     middleware (0.1.0)
-    mimemagic (0.3.4)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.2)
     mini_portile2 (2.4.0)
     mini_racer (0.3.1)
@@ -362,7 +364,7 @@ GEM
     turbolinks (5.2.1)
       turbolinks-source (~> 5.2)
     turbolinks-source (5.2.0)
-    tzinfo (1.2.7)
+    tzinfo (1.2.10)
       thread_safe (~> 0.1)
     unicorn (5.6.0)
       kgio (~> 2.6)